[Lua]: Add annotations to the core codebase. #2326

	name: Linter
	on:
	pull_request: ~
	push:
	branches:
	- '*'

	jobs:
	luacheck:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: nebularg/actions-luacheck@v1
	with:
	files: 'lua'

Provide feedback