Add ESLint configuration and update linter workflow

- Added `eslint.config.js` with recommended rules and stylistic guidelines.
- Updated `.gitignore` to exclude additional log files.
- Added ESLint dependencies and `lint` script to `package.json`.
- Simplified linter workflow by removing redundant dependency installation steps.

Author: nurefexc

.github/workflows/linter.yml

@@ -19,8 +19,7 @@ jobs:
           node-version: '20'
 
       - name: Install dependencies
-        run: |
-          npm install eslint @eslint/js @stylistic/eslint-plugin --save-dev
+        run: npm install
 
       - name: Run linter
         run: make lint

.gitignore

@@ -7,6 +7,9 @@ schemas/gschemas.compiled
 # Node.js
 node_modules/
 package-lock.json
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
 
 # IDEs and editors
 .vscode/

eslint.config.js

@@ -0,0 +1,43 @@
+import js from '@eslint/js';
+import stylistic from '@stylistic/eslint-plugin';
+import globals from 'globals';
+
+export default [
+    js.configs.recommended,
+    {
+        plugins: {
+            '@stylistic': stylistic,
+        },
+        languageOptions: {
+            ecmaVersion: 'latest',
+            sourceType: 'module',
+            globals: {
+                ...globals.browser,
+                ...globals.es2021,
+                // GNOME Shell and GObject specific globals
+                imports: 'readonly',
+                Intl: 'readonly',
+                TextDecoder: 'readonly',
+                console: 'readonly',
+                print: 'readonly',
+                log: 'readonly',
+                logError: 'readonly',
+            },
+        },
+        rules: {
+            ...stylistic.configs['recommended-flat'].rules,
+            '@stylistic/indent': ['error', 4],
+            '@stylistic/semi': ['error', 'always'],
+            '@stylistic/quotes': ['error', 'single'],
+            'no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+            'no-console': 'off',
+        },
+    },
+    {
+        ignores: [
+            'node_modules/',
+            '*.zip',
+            'schemas/gschemas.compiled',
+        ],
+    },
+];

package.json

@@ -0,0 +1,17 @@
+{
+  "name": "matrix-status",
+  "version": "1.1.0",
+  "description": "High-performance Matrix notification monitor for GNOME Shell.",
+  "main": "extension.js",
+  "scripts": {
+    "lint": "eslint ."
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.0.0",
+    "@stylistic/eslint-plugin": "^2.0.0",
+    "eslint": "^9.0.0",
+    "globals": "^15.0.0"
+  },
+  "author": "nurefexc",
+  "license": "MIT"
+}