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

node_modules/jsondiffpatch/bin/jsondiffpatch.js

@@ -0,0 +1,18 @@
+#!/usr/bin/env node
+
+import { readFileSync } from 'node:fs';
+import * as jsondiffpatch from '../lib/with-text-diffs.js';
+import * as consoleFormatter from '../lib/formatters/console.js';
+
+const fileLeft = process.argv[2];
+const fileRight = process.argv[3];
+
+if (!fileLeft || !fileRight) {
+  console.log('\n  USAGE: jsondiffpatch left.json right.json');
+} else {
+  const left = JSON.parse(readFileSync(fileLeft));
+  const right = JSON.parse(readFileSync(fileRight));
+
+  const delta = jsondiffpatch.diff(left, right);
+  consoleFormatter.log(delta);
+}