Add codegen check to CI

.github/workflows/ci.yml

@@ -127,6 +127,36 @@ jobs:
 
       - run: make swift.fmt check=yes dockerized=no
 
+  codegen:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: subosito/flutter-action@v2
+      - uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: stable
+
+      - name: Install Linux dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+                       libgtk-3-dev libpulse-dev libudev-dev libxcomposite-dev \
+                       libxdamage-dev libxfixes-dev libxrandr-dev libxtst-dev \
+                       ninja-build lld-19 binutils build-essential clang
+          # TODO: Remove once lld-19 becomes the default in Ubuntu repositories
+          sudo update-alternatives --install /usr/bin/lld lld /usr/bin/lld-19 100
+          sudo update-alternatives --config lld
+          sudo update-alternatives --install /usr/bin/ld.lld ld.lld /usr/bin/ld.lld-19 100
+          sudo update-alternatives --config ld.lld
+
+      - run: cargo install cargo-expand
+
+      - run: make cargo.gen
+
+      - run: make flutter.fmt
+
+      - run: git status --short | (! read -t 1 -N 1)
+