ci: Add release workflows

.github/workflows/backport-pull-request.yml

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+# This workflow is triggered when a pull request is merged and the label 'release' is present.
+# It opens a pull request to backport the changes from main to develop.
+name: Create backport pull request
+
+on:
+  pull_request:
+    branches:
+      - main
+    types:
+      - closed
+
+jobs:
+
+  create-backport-pull-request:
+    if: ${{ (github.event.pull_request.merged == true) && (contains(github.event.pull_request.labels.*.name, 'release')) }}
+    runs-on: ubuntu-22.04
+
+    steps:
+
+        - uses: actions/checkout@v4
+          with:
+            ref: develop
+
+        # See https://github.com/peter-evans/create-pull-request/blob/main/docs/examples.md#keep-a-branch-up-to-date-with-another
+        - name: Fetch main branch
+          run: |
+            git fetch origin main:main
+            git reset --hard main
+
+        - name: Create Pull Request
+          uses: peter-evans/create-pull-request@v6
+          with:
+            commit-message: 'chore: backport main to develop'
+            title: Backport main to develop
+            branch: chore/backport-main-to-develop
+            base: develop

.github/workflows/hotfix-pull-request.yml

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+name: Create hotfix pull request
+
+on:
+  workflow_dispatch:
+    inputs:
+      changelog-message:
+        type: string
+        description: The message to add to the changelog
+        required: true
+
+jobs:
+
+  create-hotfix-pull-request:
+    runs-on: ubuntu-22.04
+
+    steps:
+
+      - uses: actions/checkout@v4
+        with:
+          ref: main
+
+      - name: Release drafter
+        uses: release-drafter/release-drafter@v6
+        id: release-drafter
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update release draft
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { owner, repo } = context.repo;
+            await github.rest.repos.updateRelease({
+              owner,
+              repo,
+              release_id: "${{ steps.release-drafter.outputs.id }}",
+              draft: true,
+              body: "### 🐛 Bug Fixes\n ${{ inputs.changelog-message }}\n"
+            });
+
+      - name: Update CHANGELOG.md file
+        uses: stefanzweifel/changelog-updater-action@v1
+        with:
+          latest-version: ${{ steps.release-drafter.outputs.tag_name }}
+          release-notes: "### 🐛 Bug Fixes\n ${{ inputs.changelog-message }}\n"
+
+      - name: Update other files
+        run: |
+          ./scripts/update-files-with-release-version.sh ${{ steps.release-drafter.outputs.tag_name }}
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v6
+        with:
+          commit-message: 'chore: update version'
+          title: Release ${{ steps.release-drafter.outputs.tag_name }}
+          body: |
+            Update version to ${{ steps.release-drafter.outputs.tag_name }}
+    
+            ### Checklist of actions to be done before merging
+            - [ ] Review and update the CHANGELOG.md if needed
+            - [ ] Review and update the Github release draft if needed
+            - [ ] Review the files updated with the new version number in the commit named "chore: update version"
+          branch: hotfix/${{ steps.release-drafter.outputs.tag_name }}
+          base: main
+          labels: hotfix, release
+

.github/workflows/release-publish.yml

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+# This workflow is triggered when a pull request is merged and the label 'release' is present.
+# It fetches the last draft release, updates it to a non-draft release and sends a Slack message with the release notes.
+name: Publish Release
+
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+
+  release:
+    if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'release')
+    runs-on: ubuntu-22.04
+
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - name: Install taskfile.dev
+        uses: arduino/setup-task@v2
+        with:
+          version: 3.x
+          repo-token: ${{ github.token }}
+
+      - name: Fetch last draft release
+        id: fetch-release-draft
+        shell: bash
+        run: |
+
+          # Call Github releases API and filter draft releases
+          DRAFT_RELEASE=$(curl \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ github.token }}" \
+            https://api.github.com/repos/${{ github.repository }}/releases | \
+            jq 'map(select(.draft == true))' \
+          )
+
+          # Fail if 0 or more than 1 draft release is found
+          if [[ $(echo $DRAFT_RELEASE | jq 'length') -ne 1 ]]
+          then
+            echo "No draft release found or more than one draft release found"
+            exit 1
+          fi
+
+          DRAFT_RELEASE=$(echo $DRAFT_RELEASE | jq first)
+
+          # Retrieve name, id and body of the draft release
+          # We need to remove the quotes from the JSON output
+          NAME=$(echo $DRAFT_RELEASE | jq '.name' | sed 's/"//g')
+          ID=$(echo $DRAFT_RELEASE | jq '.id')
+          BODY=$(echo $DRAFT_RELEASE | jq '.body' | sed 's/"//g')
+
+          # Add URLs to GitHub pull requests
+          PULL_REQUEST_URL_START=${{ github.server_url }}/${{ github.repository }}/pull/
+          ESCAPED_PULL_REQUEST_URL_START=$(printf '%s\n' "$PULL_REQUEST_URL_START" | sed -e 's/[\/&]/\\&/g')
+          BODY=$(echo -e "$BODY" | sed -E "s/#([0-9]+)/[#\1](${ESCAPED_PULL_REQUEST_URL_START}\1)/g")
+
+          # Add URLs to GitHub profiles
+          PROFILE_URL_START=${{ github.server_url }}/
+          ESCAPED_PROFILE_URL_START=$(printf '%s\n' "$PROFILE_URL_START" | sed -e 's/[\/&]/\\&/g')
+          BODY=$(echo -e "$BODY" | sed -E "s/@([[:alnum:]-]+)/[@\1](${ESCAPED_PROFILE_URL_START}\1)/g")
+
+          # Write the output variables
+          echo "name=$NAME" >> $GITHUB_OUTPUT
+          echo "id=$ID" >> $GITHUB_OUTPUT
+          echo "body<<EOF" >> $GITHUB_OUTPUT
+          echo -e "$BODY" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+
+      - name: Publish Github release
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { owner, repo } = context.repo;
+            await github.rest.repos.updateRelease({
+              owner,
+              repo,
+              release_id: "${{ steps.fetch-release-draft.outputs.id }}",
+              draft: false,
+              make_latest: true,
+              tag_name: "${{ steps.fetch-release-draft.outputs.name }}"
+            });
+
+      - name: Format release notes for Slack
+        # v1.0.2 cannot be used as it is not correctly handling the newlines
+        uses: LoveToKnow/[email protected]
+        id: slack-markdown-release-notes
+        with:
+          text: |
+            New release of ${{ github.repository }}, **[${{ steps.fetch-release-draft.outputs.name }}](https://github.com/${{ github.repository }}/releases/tag/${{ steps.fetch-release-draft.outputs.name }})**:
+
+            ${{ steps.fetch-release-draft.outputs.body }}
+
+      - name: Send changelog to Slack
+        uses: slackapi/[email protected]
+        with:
+          # TODO: Replace with channel #alma_changelog (id: CR9C57YM6) once full testing is done
+          # Channel `#devx-experiments`
+          channel-id: C04MQ9VEWRF
+          slack-message: ${{ steps.slack-markdown-release-notes.outputs.text }}
+          payload: |
+            {
+              "username": "${{ github.event.sender.login }}",
+              "icon_url": "${{ github.event.sender.avatar_url }}"
+            }
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_RELEASE_CHANGELOG_BOT_TOKEN }}