fix(ci): allow same version in npm publish workflow

Add --allow-same-version to npm version commands so the publish
workflow doesn't fail when package.json already contains the target
version. Also skip the version bump commit when there are no changes.

Author: Daniel-Robbins

.github/workflows/publish.yml

@@ -28,8 +28,8 @@ jobs:
 
       - name: Update version in package.json files
         run: |
-          npm version "${{ steps.version.outputs.VERSION }}" --no-git-tag-version
-          npm version "${{ steps.version.outputs.VERSION }}" --no-git-tag-version -w packages/plugin
+          npm version "${{ steps.version.outputs.VERSION }}" --no-git-tag-version --allow-same-version
+          npm version "${{ steps.version.outputs.VERSION }}" --no-git-tag-version --allow-same-version -w packages/plugin
 
       - name: Install dependencies
         run: npm ci
@@ -51,10 +51,10 @@ jobs:
       - name: Publish root package
         run: npm publish --access public
 
-      - name: Commit version bump
+      - name: Commit version bump (if needed)
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add package.json packages/plugin/package.json package-lock.json
-          git commit -m "chore: bump version to ${{ steps.version.outputs.VERSION }}"
-          git push origin HEAD:main
+          git diff --cached --quiet && echo "No version changes to commit" || \
+            (git commit -m "chore: bump version to ${{ steps.version.outputs.VERSION }}" && git push origin HEAD:main)