CI: build/test workflow (first pipeline on the new forge infrastructure)

.gitea/workflows/build.yml

@@ -0,0 +1,13 @@
+name: build
+on: [push]
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+    container: rust:1-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: cargo build --workspace
+      - name: Test
+        run: cargo test --workspace --quiet