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

@@ -1,2 +1,3 @@
 export * from "./clean-graphql-schema"
 export * from "./graphql-schema-to-fields"
+export * from "./initialize-factory"

packages/modules-sdk/src/utils/initialize-factory.ts

@@ -0,0 +1,44 @@
+import {
+  ExternalModuleDeclaration,
+  InternalModuleDeclaration,
+  ModuleExports,
+  ModuleServiceInitializeCustomDataLayerOptions,
+  ModuleServiceInitializeOptions,
+} from "@medusajs/types"
+import { MODULE_PACKAGE_NAMES } from "../definitions"
+import { MedusaModule } from "../medusa-module"
+
+/**
+ * Generate a initialize module factory that is exported by the module to be initialized manually
+ *
+ * @param moduleName
+ * @param moduleDefinition
+ */
+export function initializeFactory<T>({
+  moduleName,
+  moduleDefinition,
+}: {
+  moduleName: string
+  moduleDefinition: ModuleExports
+}) {
+  return async (
+    options?:
+      | ModuleServiceInitializeOptions
+      | ModuleServiceInitializeCustomDataLayerOptions
+      | ExternalModuleDeclaration
+      | InternalModuleDeclaration,
+    injectedDependencies?: any
+  ) => {
+    const loaded = await MedusaModule.bootstrap<T>({
+      moduleKey: moduleName,
+      defaultPath: MODULE_PACKAGE_NAMES[moduleName],
+      declaration: options as
+        | InternalModuleDeclaration
+        | ExternalModuleDeclaration,
+      injectedDependencies,
+      moduleExports: moduleDefinition,
+    })
+
+    return loaded[moduleName] as T
+  }
+}