chore(): Reorganize modules (#7210)

**What**
Move all modules to the modules directory

packages/modules/cache-redis/src/initialize/index.ts

@@ -0,0 +1,23 @@
+import {
+  ExternalModuleDeclaration,
+  InternalModuleDeclaration,
+  MedusaModule,
+  Modules,
+} from "@medusajs/modules-sdk"
+import { ICacheService } from "@medusajs/types"
+import { RedisCacheModuleOptions } from "../types"
+
+export const initialize = async (
+  options?: RedisCacheModuleOptions | ExternalModuleDeclaration
+): Promise<ICacheService> => {
+  const serviceKey = Modules.CACHE
+  const loaded = await MedusaModule.bootstrap<ICacheService>({
+    moduleKey: serviceKey,
+    defaultPath: "@medusajs/cache-redis",
+    declaration: options as
+      | InternalModuleDeclaration
+      | ExternalModuleDeclaration,
+  })
+
+  return loaded[serviceKey]
+}