ci(github): add a job for checking REUSE compliance

Refs: #50

Author: ejpcmac

.github/workflows/ci.yml

@@ -46,6 +46,23 @@ jobs:
       - name: Run the commit linter
         run: nix develop .#ci-committed -c elixir scripts/check_commits.exs
 
+  reuse:
+    name: REUSE Compliance
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone the repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Setup the Nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Setup the environment
+        run: nix build -L --no-link .#devShells.x86_64-linux.ci-reuse
+      - name: Run the REUSE compliance linter
+        run: nix develop .#ci-reuse -c reuse lint
+
   format:
     name: Code formatting and typos
     runs-on: ubuntu-latest