Add new workflows to deploy

.github/workflows/publish.yml

@@ -0,0 +1,29 @@
+name: Release
+on:
+  push:
+    branches:
+      - releases
+  release:
+    types:
+      - published
+  workflow_dispatch:
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 14
+          registry-url: https://registry.npmjs.org/
+
+      - name: Install the dependencies
+        run: npm i
+
+      - name: Install vsce
+        run: npm i -g vsce
+
+      - name: Publish
+        run: vsce publish -p ${{ secrets.VSCE_PAT }}

.github/workflows/welcome.yml

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+name: Welcome New Contributors
+
+on:
+  branches:
+      - main
+  pull_request_target:
+      types: [ opened ]
+
+jobs:
+  # Comments on a pull request when the author is a new contributor.
+  post-welcome-message:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: bubkoo/welcome-action@8dbbac2540d155744c90e4e37da6b05ffc9c5e2c # v1.0.3
+        with:
+          GITHUB_TOKEN: ${{ secrets.ACTION_TOKEN }}
+          FIRST_PR_COMMENT:
+            Hi @{{ author }}! 👋
+            Thank you for your contribution to ClassicPress Snippets! 💖
+            It looks like this is your first pull request. We appreciate and value your contribution!
+
+            Please read our [contribution guide](CONTRIBUTING.md) to find out how you can be more involved.
+
+			Thank you,
+			Laurence, ClassicPress Snippets Team.