monorepo 버전 준비

## @strpc
기존 RPC를 package화

### @strpc/express
express의 middleware + router 결함

## @sammo
게임 전체
- server, client
- gateway_server, gateway_client

@sammo/util/src/index.ts

@@ -0,0 +1,44 @@
+export * from "./bsonify.js"
+export * from "./jsonify.js"
+export * from "./error.js"
+export * from "./unwrap.js"
+export * from "./types.js"
+export * from "./web.js"
+
+export * from "./strongType.js"
+
+export * as converter from "./converter/index.js"
+export * as datetime from "./datetime/index.js";
+export * as korean from "./korean/index.js";
+export * as string from "./string/index.js";
+
+export function calcBase64Len(length: number) {
+	return ((4 * length / 3) + 3) & ~3;
+}
+
+export function delay(time: number): Promise<void>;
+export function delay<T>(time: number, result: T): Promise<T>;
+export function delay<T = undefined>(time: number, result?: T): Promise<T | void> {
+	return new Promise(resolve =>
+		setTimeout(() => {
+			resolve(result);
+		}, time)
+	);
+}
+
+export function isBufferSource(obj: unknown): obj is BufferSource {
+	if (obj instanceof ArrayBuffer){
+		return true;
+	}
+	if('SharedArrayBuffer' in globalThis && obj instanceof SharedArrayBuffer){
+		return true;
+	}
+	if (ArrayBuffer.isView(obj)){
+		return true;
+	}
+	return false;
+}
+
+export function isNotNull<T>(value: T|null|undefined):value is T{
+    return value !== null && value !== undefined;
+}