feat(workflows): add GitHub release sync workflow

- Add a workflow to synchronize Gitea releases with GitHub
- Remove deprecated upload-assets workflow example

.gitea/workflows/sync-release-to-github.yml

@@ -0,0 +1,27 @@
+name: Sync Release to GitHub
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.release.tag_name }}
+
+      - name: Run Releases Sync Action
+        uses: https://git.0xmax42.io/actions/releases-sync@main
+        with:
+          gitea_token: $ACTIONS_RUNTIME_TOKEN
+          gitea_url: https://git.0xmax42.io
+          gitea_owner: maxp
+          gitea_repo: http-kernel
+          tag_name: ${{ inputs.tag || github.event.release.tag_name }}
+          github_token: ${{ secrets.SYNC_GITHUB_TOKEN }}
+          github_owner: 0xMax42
+          github_repo: http-kernel