Add a Luacheck workflow

.github/workflows/luacheck.yml

@@ -0,0 +1,16 @@
+name: Luacheck
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  luacheck:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Luacheck linter
+        uses: lunarmodules/luacheck@v1
+        with:
+          args: src/

.luacheckrc

@@ -0,0 +1,3 @@
+globals = {
+           "unique_id"
+}