refactor: remove rename-imports scripts

Update approach of dealing with file extensions differences between typescript & node.

Leverages `rewriteRelativeImportExtensions` that was added in typescript 5.7 [1], and that is recommended path by node to run typescript in the future [2]

[1] https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-7.html#path-rewriting-for-relative-paths

[2] https://nodejs.org/api/typescript.html#type-stripping

test/unit/DragAndDropEvents-test.ts

@@ -9,7 +9,7 @@ import {
   simulatePointerDown,
   simulatePointerMove,
   simulatePointerUp,
-} from './test-utils';
+} from './test-utils.ts';
 
 describe('DragAndDropEvents', function () {
   // ======================================================