Linux support

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: 1
+
+jobs:
+  fmt:
+    name: 'Format (rustfmt)'
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Rust (stable + rustfmt)
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+
+      - name: Rust cache
+        uses: Swatinem/rust-cache@v2
+
+      - name: cargo fmt --check
+        run: cargo fmt --all --check
+
+  test:
+    name: 'Test / Clippy (${{ matrix.rust }}, ${{ matrix.os }})'
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        rust:
+          - stable
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install system dependencies (Linux)
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libglib2.0-dev pkg-config libgtk-3-dev libxdo-dev libappindicator3-dev
+
+    - name: Install Rust (${{ matrix.rust }})
+      uses: dtolnay/rust-toolchain@master
+      with:
+        toolchain: ${{ matrix.rust }}
+
+    - name: Rust cache
+      uses: Swatinem/rust-cache@v2
+
+    - name: cargo clippy
+      run: cargo clippy --all-targets
+
+    - name: cargo test
+      run: cargo test --all-targets