core: add server-loader (#816)

framework/framework/serializer.ts

@@ -0,0 +1,11 @@
+import type { HandlerCommon } from './server';
+
+export default function serializer(ignoreSerializeFunction = false, h?: HandlerCommon) {
+    return (k: string, v: any) => {
+        if (k.startsWith('_') && k !== '_id') return undefined;
+        if (typeof v === 'bigint') return `BigInt::${v.toString()}`;
+        if (!ignoreSerializeFunction && v && typeof v === 'object'
+            && 'serialize' in v && typeof v.serialize === 'function') return v.serialize(h);
+        return v;
+    };
+}