fix(browser): place imports before module const in TimeBasedDebouncer

RENDER_DEBOUNCE_THRESHOLD_MS was declared above the import, which
breaks ES module conventions and can confuse tooling. Move the import
to the top of the module after the license header.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/browser/TimeBasedDebouncer.ts

@@ -3,10 +3,10 @@
  * @license MIT
  */
 
-const RENDER_DEBOUNCE_THRESHOLD_MS = 1000; // 1 Second
-
 import { IRenderDebouncer } from './Types';
 
+const RENDER_DEBOUNCE_THRESHOLD_MS = 1000; // 1 Second
+
 /**
  * Debounces calls to update screen readers to update at most once configurable interval of time.
  */