chore(): Reorganize modules (#7210)

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

packages/modules/auth/src/module-definition.ts

@@ -0,0 +1,32 @@
+import * as Models from "@models"
+
+import { AuthModuleService } from "@services"
+import { ModuleExports } from "@medusajs/types"
+import { Modules } from "@medusajs/modules-sdk"
+import { ModulesSdkUtils } from "@medusajs/utils"
+import loadConnection from "./loaders/connection"
+import loadContainer from "./loaders/container"
+import loadProviders from "./loaders/providers"
+
+const migrationScriptOptions = {
+  moduleName: Modules.AUTH,
+  models: Models,
+  pathToMigrations: __dirname + "/migrations",
+}
+
+export const runMigrations = ModulesSdkUtils.buildMigrationScript(
+  migrationScriptOptions
+)
+export const revertMigration = ModulesSdkUtils.buildRevertMigrationScript(
+  migrationScriptOptions
+)
+
+const service = AuthModuleService
+const loaders = [loadContainer, loadConnection, loadProviders] as any
+
+export const moduleDefinition: ModuleExports = {
+  service,
+  loaders,
+  runMigrations,
+  revertMigration,
+}