Add CI

.github/workflows/ci.yaml

@@ -0,0 +1,23 @@
+name: Rust CI
+
+on:
+  push:
+  schedule:
+    - cron: '0 0 * * *'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Check formatting
+      run: cargo fmt -- --check
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: cargo test --verbose