monorepo 버전 준비

## @strpc
기존 RPC를 package화

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

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

@sammo/server/src/MongoSequence.ts

@@ -0,0 +1,25 @@
+import type { StateIncrementer } from '@sammo/server_util';
+import SchemaSequence from './schema/SchemaSequence.js';
+import { InvalidArgument } from '@sammo/util';
+
+export function MongoSequenceFactory(collectionName: string): StateIncrementer{
+
+	return async (increase: number) => {
+		if(increase <= 0){
+			throw new InvalidArgument('increase must be > 0');
+		}
+		increase = Math.ceil(increase);
+
+		const result = await SchemaSequence.findOneAndUpdate({
+			collectionName,
+		}, {
+			$inc: {
+				nextSeq: increase,
+			},
+		}, {
+			upsert: true,
+			new: true,
+		});
+		return result.nextSeq;
+	}
+}