added workflow and luacheckrc

.gitea/workflows/luacheck.yml

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+name: Gitea Actions Demo
+run-name: ${{ gitea.actor }} is performing luacheck
+on: [push]
+
+jobs:
+  Explore-Gitea-Actions:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "This job is now running on a ${{ runner.os }}"
+      - run: echo "The name of your branch is ${{ gitea.ref }} and your repository is ${{ gitea.repository }}."
+      - name: Check out repository code
+        uses: actions/checkout@v3
+      - run: echo "The ${{ gitea.repository }} repository has been cloned to the runner."
+      - name: Install dependencies
+        run: apt update && apt install neovim python3 lua5.4
+      - run: echo "The workflow is now ready to test your code on the runner."
+      - name: Luacheck linter
+        uses: lunarmodules/luacheck@v1
+      - run: echo "This job's status is ${{ job.status }}."
+

.luacheckrc

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+color = true
+globals = {
+    "vim"
+}