use node: prefix for requires

mostly because code is being autogenerated by all the AI stuff using
this prefix. it's also used in the stack trace.

src/groups.js

@@ -27,10 +27,10 @@ exports = module.exports = {
 };
 
 const apps = require('./apps.js'),
-    assert = require('assert'),
+    assert = require('node:assert'),
     BoxError = require('./boxerror.js'),
     constants = require('./constants.js'),
-    crypto = require('crypto'),
+    crypto = require('node:crypto'),
     database = require('./database.js'),
     eventlog = require('./eventlog.js'),
     safe = require('safetydance');