init: 从 cs-hand/hand-server-2/lib/shrimp 抽出独立仓

- 6 个框架源文件搬到 src/, 加 src/index.ts barrel 作为公共 API 入口
- package.json 标 private, main/types 指 src/index.ts (ts-node 消费方编译)
- 加 vitest + 22 条单元测试 (ILabel / MemoryShrimpCrud) 全通过
- examples/basic-admin/ 用 MemoryShrimpCrud 跑零 Mongo 依赖 demo

待办: ShrimpServer 强耦合 Mongo+JWT+Express, crudRegistry 用
.model 判断数据源, 这两个问题在 demo 中已暴露, 计划后续重构补到 90 分。

package.json

@@ -0,0 +1,37 @@
+{
+    "name": "shrimp-server",
+    "version": "0.1.0",
+    "private": true,
+    "description": "Shrimp 框架后端 — 声明式字段驱动的 Node.js 管理后台框架(Express + Mongoose + JWT)",
+    "main": "src/index.ts",
+    "types": "src/index.ts",
+    "files": [
+        "src",
+        "README.md"
+    ],
+    "scripts": {
+        "test": "vitest run",
+        "test:watch": "vitest",
+        "typecheck": "tsc --noEmit",
+        "demo": "tsx examples/basic-admin/index.ts"
+    },
+    "peerDependencies": {
+        "express": "^4 || ^5",
+        "mongoose": "^6 || ^7 || ^8",
+        "jsonwebtoken": "^8 || ^9",
+        "bcrypt": "^5 || ^6"
+    },
+    "devDependencies": {
+        "@types/express": "^4.17.21",
+        "@types/jsonwebtoken": "^9.0.0",
+        "@types/bcrypt": "^5.0.0",
+        "@types/node": "^20.0.0",
+        "bcrypt": "^5.1.1",
+        "express": "^4.19.0",
+        "jsonwebtoken": "^9.0.2",
+        "mongoose": "^8.0.0",
+        "tsx": "^4.7.0",
+        "typescript": "^5.3.0",
+        "vitest": "^1.4.0"
+    }
+}