Add CI config

.github/workflows/main.yml

@@ -0,0 +1,29 @@
+name: CI
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push events but only for the "main" branch
+  push:
+    branches: [ main ]
+  pull_request:    
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+
+  fmt:
+    name: Cargo Format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check Rust Formatting
+        run: |
+          cd lib
+          cargo fmt -- --check
+          cd ../cli
+          cargo fmt -- --check