add release drafter

.github/workflows/release-drafter.yml

@@ -0,0 +1,29 @@
+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  update_release_draft:
+    permissions:
+      contents: write
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: release-drafter/release-drafter@v6
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+template: |
+  ## v$RESOLVED_VERSION
+
+  The latest changes to `llm-cloudflare`:
+
+  $CHANGES
+
+  Delta since the last release: https://github.com/$OWNER/$REPOSITORY/compare/$PREVIOUS_TAG...v$RESOLVED_VERSION