Add LuaCheck (#17)

.github/workflows/build.yml

@@ -0,0 +1,11 @@
+on: [push, pull_request]
+name: build
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: lint
+        uses: Roang-zero1/factorio-mod-luacheck@master
+        with:
+          luacheckrc_url: ""

.luacheckrc

@@ -0,0 +1,15 @@
+allow_defined_top = true
+unused_args = false
+max_line_length = false
+
+read_globals = {
+    "mcl_sounds",
+    "ItemStack",
+    "vector",
+    "default",
+    "mcl_core"
+}
+
+globals = {
+    "minetest"
+}