ci: install cairo deps for pycairo build

Author: szabozoltan69

.github/workflows/ci.yml

@@ -40,6 +40,11 @@ jobs:
       - name: Setup uv python environment
         run: uv venv
 
+      - name: Install system deps for pycairo
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libcairo2-dev pkg-config
+
       - name: uv lock check
         run: uv lock --locked --offline