build: added automated workflow for publishing releases

- versions.json — added "1.7.10": "1.5.0" so the current version is represented; npm version will keep it updated from here on
- .github/workflows/release.yml — new file; triggers on any X.Y.Z tag, builds the plugin, uses the matching release-notes/release-X.Y.Z.md (or generates a placeholder), appends a full-changelog link, and creates a draft release with dist/main.js, dist/manifest.json, dist/styles.css

To cut a release going forward:

npm version patch   # or minor / major / explicit version
git push && git push --tags

Then review and publish the draft on GitHub.

.github/workflows/release.yml

@@ -0,0 +1,50 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - run: npm ci
+
+      - run: npm run build
+
+      - name: Prepare release notes
+        run: |
+          VERSION="${GITHUB_REF_NAME}"
+          NOTES="release-notes/release-${VERSION}.md"
+          if [ ! -f "$NOTES" ]; then
+            echo "No release notes provided for version ${VERSION}." > "$NOTES"
+          fi
+          PREV_TAG=$(git tag --sort=-version:refname | grep -A1 "^${VERSION}$" | tail -1)
+          if [ -n "$PREV_TAG" ] && [ "$PREV_TAG" != "$VERSION" ]; then
+            echo "" >> "$NOTES"
+            echo "**Full changelog**: https://github.com/${{ github.repository }}/compare/${PREV_TAG}...${VERSION}" >> "$NOTES"
+          fi
+
+      - uses: softprops/action-gh-release@v2
+        with:
+          name: ${{ github.ref_name }}
+          body_path: release-notes/release-${{ github.ref_name }}.md
+          make_latest: true
+          draft: true
+          prerelease: false
+          files: |
+            dist/main.js
+            dist/manifest.json
+            dist/styles.css

versions.json

@@ -1,3 +1,4 @@
 {
-	"1.0.0": "0.15.0"
+	"1.0.0": "0.15.0",
+	"1.7.10": "1.5.0"
 }