Introduce VSCode companion extension (#3917)

packages/vscode-ide-companion/eslint.config.mjs

@@ -0,0 +1,34 @@
+import typescriptEslint from '@typescript-eslint/eslint-plugin';
+import tsParser from '@typescript-eslint/parser';
+
+export default [
+  {
+    files: ['**/*.ts'],
+  },
+  {
+    plugins: {
+      '@typescript-eslint': typescriptEslint,
+    },
+
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 2022,
+      sourceType: 'module',
+    },
+
+    rules: {
+      '@typescript-eslint/naming-convention': [
+        'warn',
+        {
+          selector: 'import',
+          format: ['camelCase', 'PascalCase'],
+        },
+      ],
+
+      curly: 'warn',
+      eqeqeq: 'warn',
+      'no-throw-literal': 'warn',
+      semi: 'warn',
+    },
+  },
+];