fix(linter): add files entry to react flat configs to avoid applying TS rules to JSON files (#29457)

This PR fixes an issue with React libs, where TS rules are being applied
to JSON files.

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## Current Behavior
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Fixes #28245

---------

Co-authored-by: Colum Ferry <cferry09@gmail.com>

packages/eslint-plugin/src/flat-configs/react-base.ts

@@ -18,6 +18,16 @@ import tseslint from 'typescript-eslint';
  * https://github.com/facebook/create-react-app/blob/567f36c9235f1e1fd4a76dc6d1ae00be754ca047/packages/eslint-config-react-app/index.js
  */
 export default tseslint.config({
+  files: [
+    '**/*.ts',
+    '**/*.cts',
+    '**/*.mts',
+    '**/*.tsx',
+    '**/*.js',
+    '**/*.cjs',
+    '**/*.mjs',
+    '**/*.jsx',
+  ],
   plugins: { import: importPlugin },
   languageOptions: {
     globals: {

packages/eslint-plugin/src/flat-configs/react-jsx.ts

@@ -15,12 +15,32 @@ import tseslint from 'typescript-eslint';
  */
 export default tseslint.config(
   {
+    files: [
+      '**/*.ts',
+      '**/*.cts',
+      '**/*.mts',
+      '**/*.tsx',
+      '**/*.js',
+      '**/*.cjs',
+      '**/*.mjs',
+      '**/*.jsx',
+    ],
     plugins: {
       'react-hooks': reactHooksPlugin,
     },
     rules: reactHooksPlugin.configs.recommended.rules,
   },
   {
+    files: [
+      '**/*.ts',
+      '**/*.cts',
+      '**/*.mts',
+      '**/*.tsx',
+      '**/*.js',
+      '**/*.cjs',
+      '**/*.mjs',
+      '**/*.jsx',
+    ],
     settings: { react: { version: 'detect' } },
     plugins: {
       'jsx-a11y': jsxA11yPlugin,

packages/eslint-plugin/src/flat-configs/react-typescript.ts

@@ -11,6 +11,16 @@ import tseslint from 'typescript-eslint';
  * package.
  */
 export default tseslint.config({
+  files: [
+    '**/*.ts',
+    '**/*.cts',
+    '**/*.mts',
+    '**/*.tsx',
+    '**/*.js',
+    '**/*.cjs',
+    '**/*.mjs',
+    '**/*.jsx',
+  ],
   rules: {
     // TypeScript"s `noFallthroughCasesInSwitch` option is more robust (#6906)
     'default-case': 'off',