style: apply oxfmt baseline formatting across all source files (#25)

## Summary
- Run `oxfmt .` across the entire codebase to establish formatted baseline
- 299 files changed — mechanical formatting only, no logic changes
- Double quotes, semicolons, 2-space indent, trailing commas, 100 print width

Part 3/4 of [VA-851](https://linear.app/heygen/issue/VA-851/pre-migration-configure-eslint-prettier-and-conventional-commits)

## Test plan
- [x] `pnpm format:check` — all 426 files pass
- [x] `pnpm -r typecheck` — all packages pass
- [x] `pnpm build` — all packages build
- [x] All 348 tests pass

packages/engine/src/services/fileServer.ts

@@ -135,7 +135,9 @@ export function createFileServer(options: FileServerOptions): Promise<FileServer
     // Remove leading slash
     const relativePath = requestPath.replace(/^\//, "");
     const compiledPath = compiledDir ? join(compiledDir, relativePath) : null;
-    const hasCompiledFile = Boolean(compiledPath && existsSync(compiledPath) && statSync(compiledPath).isFile());
+    const hasCompiledFile = Boolean(
+      compiledPath && existsSync(compiledPath) && statSync(compiledPath).isFile(),
+    );
     const filePath = hasCompiledFile ? (compiledPath as string) : join(projectDir, relativePath);
 
     if (!existsSync(filePath) || !statSync(filePath).isFile()) {