Add README, fix Node.js 24 deprecation in release workflow.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/release.yml

@@ -41,6 +41,8 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+    env:
+      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
     steps:
       - name: Extract version
         id: extract-version