add .github/workflows/ci.yml

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: Continuous integration
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  formatting:
+    name: Formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+          target: thumbv7em-none-eabihf
+      - run: cargo fmt -- --check
+  linting:
+    name: Linting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+          target: thumbv7em-none-eabihf
+      - run: cargo clippy --all-features -- --deny=warnings