Add HTML5 web version playable via GitHub Pages

- Port game to HTML5 Canvas/JavaScript
- Add touch controls for mobile play
- Add keyboard controls (Arrow keys + Z/X)
- Update GitHub Actions to deploy to Pages on main branch

Play at: https://elliptic1.github.io/BubbleBobble/

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

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

Author: elliptic1

.github/workflows/android-build.yml

@@ -37,3 +37,33 @@ jobs:
           name: app-debug
           path: app/build/outputs/apk/debug/app-debug.apk
           retention-days: 14
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.ref == 'refs/heads/main'
+
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4