Add ESLint configuration files and VSCode settings for improved code quality and development experience

.eslintrc.json

@@ -0,0 +1,32 @@
+{
+  "root": true,
+  "env": {
+    "es2022": true,
+    "node": true,
+    "browser": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2022,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true
+    }
+  },
+  "plugins": [],
+  "extends": [
+    "eslint:recommended"
+  ],
+  "ignorePatterns": [
+    "node_modules/",
+    "out1",
+    "dist/",
+    "build/"
+  ],
+  "overrides": [
+    {
+      "files": ["**/*.jsx"],
+      "rules": {}
+    }
+  ]
+}
+

.vscode/launch.json

@@ -0,0 +1,14 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "command": "npm start",
+            "name": "Run npm start",
+            "request": "launch",
+            "type": "node-terminal"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+  "eslint.experimental.useFlatConfig": true,
+  "eslint.workingDirectories": [
+    {
+      "mode": "auto"
+    }
+  ]
+}
+

eslint.config.js

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+export default [
+  {
+    ignores: [
+      'node_modules',
+      'out1',
+      'dist',
+      'build'
+    ]
+  },
+  {
+    files: ['**/*.{js,jsx}'],
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      globals: {
+        browser: true,
+        node: true
+      }
+    },
+    rules: {
+      // baseline rules; extend as needed
+      'no-unused-vars': ['warn', { argsIgnorePattern: '^_', varsIgnorePattern: '^_' }],
+      'no-undef': 'error',
+      'no-console': 'off'
+    }
+  }
+];
+