feat: Integrate LuaLS check in CI

.github/workflows/luacheck.yml

@@ -65,3 +65,23 @@ jobs:
           report_paths: 'busted.xml'
           check_name: 'Lua Test Report'
           annotate_only: ${{ (github.event.pull_request.head.repo.full_name != github.repository) }}
+
+  luals-code-style:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup LuaLS
+        run: |
+          mkdir -p ~/.local/bin/luals
+          curl -L https://github.com/LuaLS/lua-language-server/releases/download/3.17.1/lua-language-server-3.17.1-linux-x64.tar.gz | tar -xzv -C ~/.local/bin/luals
+
+      - name: Check
+        shell: bash
+        run: |
+          ~/.local/bin/luals/bin/lua-language-server --check ./ | tee luals-check && true
+          cat luals-check | (sed -e 's/\x1b\[[0-9;]*m//g'| sed -n 's/\(lua[^:]\+\):\([[:digit:]]*\):[[:digit:]]* \[Warning\] /::warning file=\1,line=\2::/p')
+          echo "| | Files | Warnings |" >> $GITHUB_STEP_SUMMARY
+          echo "|-|-------|----------|" >> $GITHUB_STEP_SUMMARY
+          echo "| LuaLS check | $(find lua -name '*.lua' | wc -l) | $(cat luals-check | grep 'Warning' | wc -l) |" >> $GITHUB_STEP_SUMMARY