refactor: move TypeScript and TSX test code to fixture files

tests/basic/test_repomap.py

@@ -415,42 +415,12 @@ public class Test implements Greeting {
             ),
             "typescript": (
                 "test.ts",
-                "function greet(name: string): void {\n    console.log(`Hello, ${name}!`);\n}\n",
+                "",  # Now reads from fixture file
                 "greet",  # Key symbol to check
             ),
             "tsx": (
                 "test.tsx",
-                """import React, { useState, useEffect } from 'react';
-
-interface UserProps {
-    name: string;
-    age?: number;
-}
-
-// Component with props interface
-const UserGreeting: React.FC<UserProps> = ({ name, age }) => {
-    const [greeting, setGreeting] = useState<string>('');
-
-    useEffect(() => {
-        setGreeting(`Hello, ${name}${age ? ` (${age})` : ''}!`);
-    }, [name, age]);
-
-    return <h1>{greeting}</h1>;
-};
-
-// Custom hook
-function useCounter(initial: number = 0) {
-    const [count, setCount] = useState(initial);
-    const increment = () => setCount(c => c + 1);
-    return { count, increment };
-}
-
-// Constants
-const DEFAULT_NAME = 'World';
-const MAX_AGE = 150;
-
-export { UserGreeting, useCounter, DEFAULT_NAME, MAX_AGE };
-""",
+                "",  # Now reads from fixture file
                 "UserProps",  # Key symbol to check
             ),
             "csharp": (