Enhance Rust CI workflow with additional steps

Updated the CI workflow to include additional steps for installing system dependencies, setting up the Rust toolchain, caching Cargo, and running formatting and linting checks.

Author: Peter-L-SVK

.github/workflows/rust.yml

@@ -0,0 +1,49 @@
+name: Rust CI (build, lint, test)
+
+on:
+  push:
+    branches: [ stage, main ]
+  pull_request:
+    branches: [ stage, main ]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Install system dependencies (GTK, ALSA, PipeWire, WirePlumber)
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y build-essential pkg-config libglib2.0-dev libgtk-3-dev libasound2-dev libpipewire-0.3-dev pipewire wireplumber
+
+      - name: Set up Rust toolchain
+        uses: actions/setup-rust@v1
+        with:
+          rust-version: stable
+
+      - name: Cache Cargo and target
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
+
+      - name: cargo fmt check
+        run: cargo fmt --all -- --check
+
+      - name: cargo clippy (deny warnings)
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Run tests (PipeWire integration disabled by default)
+        env:
+          CI: "true"
+          GITHUB_ACTIONS: "true"
+          RUN_PIPEWIRE_INTEGRATION: "false"
+        run: cargo test --workspace --all-features --verbose