Remove release workflow (#10)

The release workflow is not needed when creating releases through
GitHub's UI. The workflow was failing because:

1. Creating a release in GitHub UI automatically creates the tag
2. The tag creation triggers the workflow
3. The workflow tries to create a release that already exists

Since releases are being created manually through the UI, this
workflow adds no value and only causes confusion with failures.

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

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/release.yml

@@ -1,46 +0,0 @@
-name: Release
-
-on:
-  push:
-    tags:
-      - 'v*'
-
-permissions:
-  contents: write
-
-jobs:
-  release:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version: '20'
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Build
-        run: npm run build
-
-      - name: Create Release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: ${{ github.ref }}
-          body: |
-            ## What's Changed
-
-            See the [commit history](https://github.com/${{ github.repository }}/compare/${{ github.event.before }}...${{ github.ref }}) for details.
-
-            ## Usage
-
-            ```yaml
-            - uses: ${{ github.repository }}@${{ github.ref }}
-            ```
-          draft: false
-          prerelease: false