v0.5.0: 重新组织目录结构,按职责拆分

- Shrimp.ts (875 行) 按类拆分到 Shrimp/(7 文件: Shrimp, ShrimpModule, ShrimpTableModule, ShrimpPower, ShrimpCrud, UserRoleModule, OperationLogModule)
- forMongo/: MongoShrimpCrud + MongoShrimp(原 ShrimpServer 的 mongo 装配部分,无 express)
- forExpress/: buildShrimpRouter + jwtAuth + types
- main/: index(0 依赖核心) + expmon(express+mongo 整合,导出 ShrimpServer) + types(纯协议)
- 入口子路径 server → expmon(express+mongo 整合方案命名更准确)
- 删除冗余的 index.ts / core.ts(合并为 main/index.ts)

test/getMenuTree.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect } from "vitest"
-import { Shrimp, ShrimpTableModule, MemoryShrimpCrud, UserModule, RoleModule } from "../src"
+import { Shrimp, ShrimpTableModule, MemoryShrimpCrud, UserModule, RoleModule } from "../src/main"
 
 describe("Shrimp.getMenuTree", () => {
     it("返回的 label 等于模块注册时声明的 label", () => {