chore: move CI to GitHub Actions

Move the CI from CircleCI to GitHub actions.

.github/workflows/ci.yml

@@ -0,0 +1,69 @@
+name: CI
+
+on: [pull_request, push]
+
+# Cancel a job if there's a new on on the same branch started.
+# Based on https://stackoverflow.com/questions/58895283/stop-already-running-workflow-job-in-github-actions/67223051#67223051
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_INCREMENTAL: 0
+  RUST_BACKTRACE: 1
+  # Faster crates.io index checkout.
+  # Enable once the MSRV is >= 1.68
+  #CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
+  RUST_LOG: debug
+
+jobs:
+  check_clippy:
+    runs-on: ubuntu-24.04
+    name: Clippy
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run cargo clippy
+        run: cargo clippy --all-targets --workspace --all-features -- -D warnings
+
+  check_fmt:
+    runs-on: ubuntu-24.04
+    name: Checking fmt
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run cargo fmt
+        run: cargo fmt --all -- --check
+
+  rustdoc:
+    runs-on: ubuntu-24.04
+    name: Rustdoc
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run rustdoc
+        run: cargo rustdoc --all-features -- -D warnings
+
+  build:
+    runs-on: ubuntu-24.04
+    name: Release build
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run cargo release build
+        run: cargo build --release
+
+  benches:
+    runs-on: ubuntu-24.04
+    name: Run benchmarks
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run benchmarks
+        run: cargo bench --all-targets
+
+  test:
+    runs-on: ubuntu-24.04
+    name: Run cargo test
+    strategy:
+      matrix:
+        cargo-args: ['--all-features', '--release -- --ignored']
+    steps:
+      - uses: actions/checkout@v4
+      - name: Test
+        run: cargo test ${{ matrix.cargo-args }}