test: Run pnpm test in CI on all PRs and pushes to main

.forgejo/workflows/continuous-integration.yaml

@@ -0,0 +1,14 @@
+on:
+   pull_request:
+   push:
+      branches: [main]
+jobs:
+   test:
+      runs-on: docker
+      container:
+         image: node:23
+      steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+      - run: npm install -g pnpm@10.8.0
+      - run: pnpm install
+      - run: pnpm test