feat(abacus-react): implement GitHub-only semantic release with manual package publishing

- Remove npm plugin from semantic-release to avoid workspace dependency issues
- Use semantic-release only for versioning, tagging, and GitHub releases
- Add manual npm publish step that syncs version from git tags
- This enables GitHub Packages publishing without npm account dependency
- Package versioning and releases are fully automated via semantic-release

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/abacus-react/.releaserc.json

@@ -22,12 +22,6 @@
         "changelogFile": "CHANGELOG.md"
       }
     ],
-    [
-      "@semantic-release/npm",
-      {
-        "npmPublish": false
-      }
-    ],
     [
       "@semantic-release/github",
       {