feat: add release workflow with automatic semantic versioning

Replace publish.yml with a new release.yml workflow that:
- Analyzes commits since last tag using conventional commits
- Automatically determines version bump (patch/minor/major)
- Allows forcing a major version bump via checkbox
- Creates git tag, publishes to Maven Central, creates GitHub release

Commit conventions:
- fix:, docs:, refactor:, etc. → patch
- feat: → minor
- feat!: or BREAKING CHANGE: → major

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: deblockt

.github/workflows/publish.yml .github/workflows/release.yml.github/workflows/publish.yml renamed to .github/workflows/release.yml

@@ -1,17 +1,24 @@
-name: Publish to Maven Central
+name: Release
 
 on:
-  release:
-    types: [ created ]
+  workflow_dispatch:
+    inputs:
+      force-major:
+        description: 'Force major version bump'
+        required: false
+        type: boolean
+        default: false
 
 jobs:
-  publish:
+  release:
     runs-on: ubuntu-latest
     permissions:
-      contents: read
+      contents: write
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Set up JDK 21
         uses: actions/setup-java@v4
@@ -22,6 +29,14 @@ jobs:
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v4
 
+      - name: Calculate and create tag
+        id: version
+        uses: mathieudutour/github-tag-action@v6.2
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          default_bump: ${{ inputs.force-major && 'major' || 'patch' }}
+          release_branches: master
+
       - name: Build with Gradle
         run: ./gradlew build
 
@@ -39,6 +54,14 @@ jobs:
           JRELEASER_GPG_SECRET_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
           JRELEASER_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Create GitHub Release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create "${{ steps.version.outputs.new_tag }}" \
+            --title "${{ steps.version.outputs.new_tag }}" \
+            --generate-notes
+
       - name: Upload JReleaser logs
         if: always()
         uses: actions/upload-artifact@v4