feat(user): Init user module (#6293)

* init user module

* add migration

* update module with latest utils

* pr ready

* make interface types interfaces

packages/user/src/models/index.ts

@@ -0,0 +1 @@
+export { default as User } from "./user"

packages/user/src/models/user.ts

@@ -0,0 +1,25 @@
+import {
+  BeforeCreate,
+  Entity,
+  OnInit,
+  PrimaryKey,
+} from "@mikro-orm/core"
+
+import { generateEntityId } from "@medusajs/utils"
+
+
+@Entity()
+export default class User {
+  @PrimaryKey({ columnType: "text" })
+  id!: string
+
+  @BeforeCreate()
+  onCreate() {
+    this.id = generateEntityId(this.id, "user")
+  }
+
+  @OnInit()
+  onInit() {
+    this.id = generateEntityId(this.id, "user")
+  }
+}