feat: Fulfillment module basic structure (#6319)

**What**
Scafold the fulfillment module basic structure

**Bonus**
Simplified module scaffolding with new factories and less directories to manage
- mikro orm connection loader factory
- initialize factory

FIXES CORE-1709
FIXES CORE-1710

packages/utils/src/modules-sdk/index.ts

@@ -2,6 +2,7 @@ export * from "./load-module-database-config"
 export * from "./decorators"
 export * from "./build-query"
 export * from "./loaders/mikro-orm-connection-loader"
+export * from "./loaders/mikro-orm-connection-loader-factory"
 export * from "./loaders/container-loader-factory"
 export * from "./create-pg-connection"
 export * from "./migration-scripts"

packages/utils/src/modules-sdk/loaders/mikro-orm-connection-loader-factory.ts

@@ -0,0 +1,34 @@
+import { InternalModuleDeclaration, LoaderOptions } from "@medusajs/types"
+import { mikroOrmConnectionLoader } from "./mikro-orm-connection-loader"
+
+/**
+ * Factory for creating a MikroORM connection loader for the modules
+ *
+ * @param moduleName
+ * @param moduleModels
+ * @param migrationsPath
+ */
+export function mikroOrmConnectionLoaderFactory({
+  moduleName,
+  moduleModels,
+  migrationsPath,
+}: {
+  moduleName: string
+  moduleModels: any[]
+  migrationsPath?: string
+}): any {
+  return async (
+    { options, container, logger }: LoaderOptions,
+    moduleDeclaration?: InternalModuleDeclaration
+  ): Promise<void> => {
+    await mikroOrmConnectionLoader({
+      moduleName,
+      entities: moduleModels,
+      container,
+      options,
+      moduleDeclaration,
+      logger,
+      pathToMigrations: migrationsPath ?? "",
+    })
+  }
+}

packages/utils/src/modules-sdk/loaders/mikro-orm-connection-loader.ts

@@ -11,6 +11,16 @@ import { ContainerRegistrationKeys, MedusaError } from "../../common"
 import { mikroOrmCreateConnection } from "../../dal"
 import { loadDatabaseConfig } from "../load-module-database-config"
 
+/**
+ * Load a MikroORM connection into the container
+ *
+ * @param moduleName
+ * @param container
+ * @param options
+ * @param moduleDeclaration
+ * @param entities
+ * @param pathToMigrations
+ */
 export async function mikroOrmConnectionLoader({
   moduleName,
   container,