Add github actions to check formatting and clippy lints

Signed-off-by: Daniel Egger <daniel@eggers-club.de>

.github/workflows/clippy.yml

@@ -0,0 +1,18 @@
+on: [push, pull_request]
+
+name: Clippy check
+jobs:
+  clippy_check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - run: rustup component add clippy
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: thumbv6m-none-eabi
+          override: true
+      - uses: actions-rs/clippy-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --features=stm32f072 --target thumbv6m-none-eabi

.github/workflows/rustfmt.yml

@@ -0,0 +1,20 @@
+on: [push, pull_request]
+
+name: Code formatting check
+
+jobs:
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - run: rustup component add rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check