ci(workflows): add VSCode marketplace publish workflow and update release config

- Add new GitHub workflow for automated VSCode extension publishing
- Configure workflow to trigger on merged PRs with release title pattern
- Set up Node.js environment and vsce publishing tool
- Update release-please PR title pattern format
- Add conditional checks for merged status and PR title format
- Configure secure PAT handling for marketplace publishing

Author: tsdevau

.github/workflows/vsce-publish.yaml

@@ -0,0 +1,34 @@
+name: Publish Extension to VSCode Marketplace
+
+on:
+  pull_request:
+    types: [closed]
+    branches:
+      - main
+
+jobs:
+  publish:
+    if: |
+      github.event.pull_request.merged == true &&
+      startsWith(github.event.pull_request.title, 'build') &&
+      contains(github.event.pull_request.title, '🔖 Release')
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install vsce
+        run: npm install -g @vscode/vsce
+
+      - name: Publish Extension
+        run: vsce publish -p ${VSCE_PAT}
+        env:
+          VSCE_PAT: ${{ secrets.VSCE_PAT }}

release-please-config.json

@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
   "packages": {
     ".": {
-      "pull-request-title-pattern": "build(${scope}): 🔖 Release ${component} ${version}",
+      "pull-request-title-pattern": "build${scope}: 🔖 Release ${component} ${version}",
       "pull-request-header": ":robot: PR by release-please bot",
       "include-v-in-tag": true,
       "initial-version": "0.1.0",