feat(abacus-react): implement GitHub Packages-only publishing workflow

- Disable npm publishing in semantic-release to avoid npm token requirement
- Use semantic-release for versioning, tagging, and GitHub releases only
- Add separate step to publish to GitHub Packages after version is created
- Configure npm registry specifically for GitHub Packages publishing
- This bypasses semantic-release npm plugin limitations while maintaining automation

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

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

.github/workflows/publish-abacus-react.yml

@@ -59,16 +59,26 @@ jobs:
       - name: Run tests
         run: pnpm --filter @soroban/abacus-react test:run || echo "Tests currently failing due to vitest config issue - will fix in follow-up"
 
-      - name: Configure npm for GitHub Packages only
+      - name: Semantic Release (versioning only)
+        working-directory: packages/abacus-react
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: npx semantic-release
+
+      - name: Configure npm for GitHub Packages
         working-directory: packages/abacus-react
         run: |
           echo "//npm.pkg.github.com/:_authToken=${{ secrets.GITHUB_TOKEN }}" > .npmrc
           echo "@soroban:registry=https://npm.pkg.github.com" >> .npmrc
+          echo "registry=https://npm.pkg.github.com" >> .npmrc
 
-      - name: Semantic Release
+      - name: Publish to GitHub Packages
         working-directory: packages/abacus-react
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          NPM_CONFIG_REGISTRY: https://npm.pkg.github.com
-          NPM_REGISTRY: https://npm.pkg.github.com
-        run: npx semantic-release
+        run: |
+          # Only publish if semantic-release created a new version
+          if git tag --list | grep -q "abacus-react-v"; then
+            echo "Publishing to GitHub Packages..."
+            npm publish
+          else
+            echo "No new version to publish"
+          fi

packages/abacus-react/.releaserc.json

@@ -42,9 +42,7 @@
     [
       "@semantic-release/npm",
       {
-        "npmPublish": true,
-        "pkgRoot": ".",
-        "tarballDir": "dist"
+        "npmPublish": false
       }
     ],
     [