refactor: Add sweep, labeler and semantic CI configuration

Author: chrisburr

.github/labeler.yml

@@ -0,0 +1,3 @@
+alsoTargeting:rel-v4r3:
+  - "*"
+  - "**/*"

.github/workflows/labeler.yml

@@ -0,0 +1,11 @@
+name: "Pull Request Labeler"
+on:
+  - pull_request_target
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v3
+        with:
+          repo-token: "${{ secrets.PAT }}"

.github/workflows/pr-sweep.yml

@@ -0,0 +1,19 @@
+name: PR sweep
+
+on:
+  - push
+
+jobs:
+  pr-sweep:
+    runs-on: ubuntu-latest
+    concurrency: pr-sweep
+    if: github.repository == 'DIRACGrid/WebAppDIRAC'
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.PAT }}
+      - uses: DIRACGrid/pr-sweeper@main
+        with:
+          github-pat: ${{ secrets.PAT }}
+          pr-project-name: DiracGridBot/WebAppDIRAC

.github/workflows/semantic.yml

@@ -0,0 +1,33 @@
+# Check that the commit messages are between 20 and 150 chars,
+# and that they follow the rule
+# <type> (<scope>): <subject>
+# type: docs, feat, fix, refactor, style or test
+# scope (optional): any extra info, (like DMS or whatever)
+
+name: "Commit Message Check"
+on: pull_request
+
+jobs:
+  check-commit-message:
+    name: Check Commit Message
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Commit Format
+        uses: gsactions/commit-message-checker@v1
+        with:
+          pattern: '^(docs|feat|fix|refactor|style|test|sweep)( ?\(.*\))?: .+$'
+          excludeDescription: "true" # optional: this excludes the description body of a pull request
+          excludeTitle: "true" # optional: this excludes the title of a pull request
+          checkAllCommitMessages: "true" # optional: this checks all commits associated with a pull request
+          accessToken: ${{ secrets.GITHUB_TOKEN }} # github access token is only required if checkAllCommitMessages is true
+          flags: "gim"
+          error: 'Your commit has to follow the format "<type>(<scope>): <subject>"".'
+      - name: Check Commit Length
+        uses: gsactions/commit-message-checker@v1
+        with:
+          pattern: "^.{20,150}$"
+          error: "Commit messages should be between 20 and 150 chars"
+          excludeDescription: "true" # optional: this excludes the description body of a pull request
+          excludeTitle: "true" # optional: this excludes the title of a pull request
+          checkAllCommitMessages: "true" # optional: this checks all commits associated with a pull request
+          accessToken: ${{ secrets.GITHUB_TOKEN }} # github access token is only required if checkAllCommitMessages is true