feat: keep projectService enabled for better caching

Keep projectService enabled when using virtual file paths to leverage
typescript-eslint's internal caching mechanism.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: baseballyama

src/parser/typescript/index.ts

@@ -37,14 +37,11 @@ export function parseTypeScriptInSvelte(
       );
       const generatedTsconfig = cacheManager.getGeneratedTsconfigPath();
       if (virtualFilePath && generatedTsconfig) {
-        // Use virtual file path and generated tsconfig for TypeScript to find type information
-        // Disable projectService to use the generated tsconfig instead
+        // Use virtual file path for TypeScript to find type information
+        // Keep projectService enabled for efficient caching
         effectiveParserOptions = {
           ...parserOptions,
           filePath: virtualFilePath,
-          project: generatedTsconfig,
-          projectService: undefined,
-          EXPERIMENTAL_useProjectService: undefined,
         };
 
         // Only update virtual file if the source file has changed