Make GitHub canonical: CI and publishing on GitHub Actions, links and package metadata point there, Gitea waits to become a mirror

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  gate:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v7.0.1
+      - run: bash ci.sh
+
+  publish:
+    concurrency:
+      cancel-in-progress: false
+      group: publish
+    if: github.event_name == 'push'
+    needs: gate
+    permissions:
+      contents: write
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v7.0.1
+      - env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: bash publish.sh