Add GitHub Actions CI: cargo fmt/clippy/test, PAM build, deb build

.github/workflows/ci.yml

@@ -0,0 +1,48 @@
+name: CI
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  rust:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libpam0g-dev libgtk-4-dev libadwaita-1-dev libfido2-dev pkg-config
+      - run: cargo fmt --all -- --check
+      - run: cargo clippy --workspace --all-targets -- -D warnings
+      - run: cargo test --workspace
+
+  pam:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - run: sudo apt-get update && sudo apt-get install -y libpam0g-dev
+      - run: make -C pam
+
+  deb:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            debhelper devscripts lintian \
+            libpam0g-dev libgtk-4-dev libadwaita-1-dev libfido2-dev pkg-config \
+            cargo rustc
+      - run: debuild -us -uc -b
+      - name: Run lintian (warnings allowed in Phase 0)
+        run: lintian --info --display-info ../ubuntu-fido*.changes || true
+      - uses: actions/upload-artifact@v4
+        with:
+          name: deb-packages
+          path: ../ubuntu-fido*.deb