feat: add workflow to create release PR from dev to main

.github/workflows/create-release-pr.yml

@@ -0,0 +1,58 @@
+name: Create Release PR
+
+on:
+  workflow_dispatch:
+    inputs:
+      title:
+        description: "Release title (optional)"
+        required: false
+        default: ""
+
+jobs:
+  create-release-pr:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get version from package.json
+        id: version
+        run: echo "current=$(jq -r .version package.json)" >> $GITHUB_OUTPUT
+
+      - name: Generate changelog preview
+        id: changelog
+        run: |
+          echo "## Changes since last release" > /tmp/changelog.md
+          echo "" >> /tmp/changelog.md
+          git log main..dev --pretty=format:"- %s" >> /tmp/changelog.md || echo "- No new commits" >> /tmp/changelog.md
+
+      - name: Create Pull Request
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TITLE="${{ github.event.inputs.title }}"
+          if [ -z "$TITLE" ]; then
+            TITLE="Release: dev → main"
+          fi
+
+          BODY=$(cat <<EOF
+          ## Release PR
+
+          Merging \`dev\` into \`main\` will trigger semantic-release to:
+          - Analyze commits and determine version bump
+          - Update CHANGELOG.md
+          - Publish to npm
+          - Create GitHub release
+
+          **Current version:** ${{ steps.version.outputs.current }}
+
+          $(cat /tmp/changelog.md)
+          EOF
+          )
+
+          gh pr create \
+            --base main \
+            --head dev \
+            --title "$TITLE" \
+            --body "$BODY"