Improve GitHub CI and dependency maintenance

.github/dependabot.yml

@@ -0,0 +1,22 @@
+version: 2
+updates:
+  - package-ecosystem: cargo
+    directory: "/"
+    schedule:
+      interval: weekly
+      day: monday
+    open-pull-requests-limit: 5
+    groups:
+      rust-dependencies:
+        patterns:
+          - "*"
+
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 5
+    groups:
+      github-actions:
+        patterns:
+          - "*"

.github/workflows/ci.yml

@@ -0,0 +1,158 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: "0"
+  RUST_BACKTRACE: "1"
+
+jobs:
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Install Linux build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y \
+            pkg-config \
+            libfontconfig1-dev \
+            libwayland-dev \
+            libx11-dev \
+            libx11-xcb-dev \
+            libxcb1-dev \
+            libxcb-render0-dev \
+            libxcb-shape0-dev \
+            libxcb-xfixes0-dev \
+            libxcursor-dev \
+            libxi-dev \
+            libxrandr-dev \
+            libxkbcommon-dev \
+            libegl1-mesa-dev \
+            libgl1-mesa-dev
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+
+      - name: Cache Rust build data
+        uses: Swatinem/rust-cache@v2
+        with:
+          shared-key: clippy
+
+      - name: Run Clippy
+        # The existing codebase has a sizeable lint backlog. Report it without
+        # blocking unrelated changes; individual lints can be tightened later.
+        run: cargo clippy --workspace --all-targets --all-features
+
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Install Linux build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y \
+            pkg-config \
+            libfontconfig1-dev \
+            libwayland-dev \
+            libx11-dev \
+            libx11-xcb-dev \
+            libxcb1-dev \
+            libxcb-render0-dev \
+            libxcb-shape0-dev \
+            libxcb-xfixes0-dev \
+            libxcursor-dev \
+            libxi-dev \
+            libxrandr-dev \
+            libxkbcommon-dev \
+            libegl1-mesa-dev \
+            libgl1-mesa-dev
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Rust build data
+        uses: Swatinem/rust-cache@v2
+        with:
+          shared-key: tests
+
+      - name: Run tests
+        run: cargo test --workspace --all-features
+
+  release-build:
+    name: Release build
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Install Linux build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y \
+            pkg-config \
+            libfontconfig1-dev \
+            libwayland-dev \
+            libx11-dev \
+            libx11-xcb-dev \
+            libxcb1-dev \
+            libxcb-render0-dev \
+            libxcb-shape0-dev \
+            libxcb-xfixes0-dev \
+            libxcursor-dev \
+            libxi-dev \
+            libxrandr-dev \
+            libxkbcommon-dev \
+            libegl1-mesa-dev \
+            libgl1-mesa-dev
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Rust build data
+        uses: Swatinem/rust-cache@v2
+        with:
+          shared-key: release
+
+      - name: Build release binary
+        run: cargo build --workspace --release --all-features

.gitignore

@@ -1,2 +1 @@
 /target
-Cargo.lock