Add simple GitHub pipeline.

.github/workflows/rust.yml

@@ -0,0 +1,24 @@
+name: Rust CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Check code formatting
+        run: cargo fmt -- --check
+
+      - name: Lint code
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Build library
+        run: cargo build --release