Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/throttleit/index.d.ts

@@ -0,0 +1,32 @@
+/**
+Throttle a function to limit its execution rate.
+
+Creates a throttled function that limits calls to the original function to at most once every `wait` milliseconds. It guarantees execution after the final invocation and maintains the last context (`this`) and arguments.
+
+@param function_ - The function to be throttled.
+@param wait - The number of milliseconds to throttle invocations to.
+@returns A new throttled version of the provided function.
+
+@example
+```
+import throttle from 'throttleit';
+
+// Throttling a function that processes data.
+function processData(data) {
+	console.log('Processing:', data);
+
+	// Add data processing logic here.
+}
+
+// Throttle the `processData` function to be called at most once every 3 seconds.
+const throttledProcessData = throttle(processData, 3000);
+
+// Simulate calling the function multiple times with different data.
+throttledProcessData('Data 1');
+throttledProcessData('Data 2');
+throttledProcessData('Data 3');
+```
+*/
+declare function throttle<T extends (...arguments_: any[]) => unknown>(function_: T, wait: number): T;
+
+export = throttle;