Add very minimal formatting and linting checks via GitHub actions

Author: MarijnS95

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  fmt:
+    name: Check formatting
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Check Formatting
+      run: cargo fmt -- --check
+
+  clippy:
+    name: Check lints
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
+    - name: Clippy
+      run: cargo clippy --all --all-targets -- -Dwarnings