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

node_modules/jsondiffpatch/lib/diffpatcher.d.ts

@@ -0,0 +1,13 @@
+import Processor from './processor.js';
+import type { Delta, Options } from './types.js';
+declare class DiffPatcher {
+    processor: Processor;
+    constructor(options?: Options);
+    options(options: Options): Options;
+    diff(left: unknown, right: unknown): Delta;
+    patch(left: unknown, delta: Delta): unknown;
+    reverse(delta: Delta): Delta;
+    unpatch(right: unknown, delta: Delta): unknown;
+    clone(value: unknown): unknown;
+}
+export default DiffPatcher;