fix(plugins): Export child_process.spawn from plugins and use plugins.spawn in spawnPath to remove direct require and unify process spawning

ts/index.ts

@@ -159,8 +159,6 @@ export const spawnPath = (
   fromFileUrl?: string | URL,
   options?: ISpawnOptions
 ): ITsrunChildProcess => {
-  const { spawn } = require('child_process');
-
   // 1. Resolve path (similar to runPath)
   const resolvedPath = fromFileUrl
     ? plugins.path.join(
@@ -192,7 +190,7 @@ export const spawnPath = (
   };
 
   // 4. Spawn child process
-  const child = spawn(process.execPath, args, spawnOptions);
+  const child = plugins.spawn(process.execPath, args, spawnOptions);
 
   // 5. Set up timeout if provided
   let timeoutId: NodeJS.Timeout | undefined;