Add a GitHub action to run luacheck

I don't know much about github actions, so I hope it works correctly.
The yml file is based on https://github.com/ChaosWormz/teleport-request/blob/master/.github/workflows/build.yml

.github/workflows/luacheck.yml

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