FIX: Add React preset to Babel config for JSX support

Critical Bug Found:
When disable_lwc_base_config: true, the smart parser selection used Babel
from LWC config but WITHOUT the @babel/preset-react preset. This caused
React .jsx files to fail parsing with error:
'Parsing error: This experimental syntax requires enabling one of the
following parser plugin(s): "jsx", "flow", "typescript"'

Root Cause:
- createJavascriptConfigArray() extracts Babel parser from LWC config
- LWC Babel config only has presets for LWC/decorators, not React JSX
- .jsx files require @babel/preset-react to parse JSX syntax
- Without it, Babel fails to recognize JSX tags like <div>

Solution:
Add @babel/preset-react to the Babel options when using smart selection:
- Maintains LWC decorator support
- Adds React JSX support
- Consistent with createJavascriptPlusLwcConfigArray() behavior

Testing:
✅ LWC .js files with decorators: Parse correctly
✅ React .jsx files with JSX: Parse correctly (was failing before)
✅ React .tsx files: Parse correctly
✅ No parsing errors in dreamhouse project

Impact:
- Fixes regression where React files broke with disable_lwc_base_config: true
- Maintains all decorator support for LWC
- Ensures both LWC and React work together

Author: aruntyagiTutu

packages/code-analyzer-eslint-engine/src/base-config.ts

@@ -157,14 +157,26 @@ export class BaseConfigFactory {
             // .js files might have LWC decorators - use Babel parser with decorator support
             const lwcConfig = validateAndGetRawLwcConfigArray()[0];
             const babelParser = lwcConfig.languageOptions?.parser;
-            const babelParserOptions = lwcConfig.languageOptions?.parserOptions;
+            const originalParserOptions = lwcConfig.languageOptions?.parserOptions as Linter.ParserOptions;
+            const originalBabelOptions = originalParserOptions.babelOptions || {};
+
+            // Add @babel/preset-react to support JSX in React files alongside LWC files
+            const enhancedParserOptions = {
+                ...originalParserOptions,
+                babelOptions: {
+                    ...originalBabelOptions,
+                    configFile: false,
+                    // Add React preset for JSX support (.jsx files and React in .js files)
+                    presets: [...(originalBabelOptions.presets || []), require.resolve('@babel/preset-react')]
+                }
+            };
 
             return [{
                 ... eslintJs.configs.all,
                 files: this.engineConfig.file_extensions.javascript.map(ext => `**/*${ext}`),
                 languageOptions: {
                     parser: babelParser,
-                    parserOptions: babelParserOptions
+                    parserOptions: enhancedParserOptions
                 }
             }];
         } else {