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/schema/SchemaSequence.ts

@@ -0,0 +1,23 @@
+import { Schema, model, Types } from 'mongoose';
+
+interface ISchemaSequence {
+	_id: Types.ObjectId;
+
+	collectionName: string;
+	nextSeq: number;
+}
+
+export const SchemaSequence = new Schema<ISchemaSequence>({
+	collectionName: { type: String, required: true },
+	nextSeq: {
+		type: Number, required: true,
+		get: (v: number) => Math.ceil(v),
+		set: (v: number) => Math.ceil(v),
+		default: 0,
+	},
+
+}, { autoIndex: true, autoCreate: true })
+	.index({ collectionName: 1 }, { unique: true })
+	;
+
+export default model<ISchemaSequence>('SchemaSequence', SchemaSequence);