chore(): Reorganize modules (#7210)

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

packages/modules/currency/src/loaders/initial-data.ts

@@ -0,0 +1,33 @@
+import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+import { ModulesSdkTypes, LoaderOptions, Logger } from "@medusajs/types"
+import { ContainerRegistrationKeys, defaultCurrencies } from "@medusajs/utils"
+import { Currency } from "@models"
+
+export default async ({
+  container,
+  options,
+}: LoaderOptions<
+  | ModulesSdkTypes.ModuleServiceInitializeOptions
+  | ModulesSdkTypes.ModuleServiceInitializeCustomDataLayerOptions
+>): Promise<void> => {
+  // TODO: Add default logger to the container when running tests
+  const logger =
+    container.resolve<Logger>(ContainerRegistrationKeys.LOGGER) ?? console
+  const {
+    currencyService_,
+  }: { currencyService_: ModulesSdkTypes.InternalModuleService<Currency> } =
+    container.resolve(ModuleRegistrationName.CURRENCY)
+
+  try {
+    const normalizedCurrencies = Object.values(defaultCurrencies).map((c) => ({
+      ...c,
+      code: c.code.toLowerCase(),
+    }))
+    const resp = await currencyService_.upsert(normalizedCurrencies)
+    logger.info(`Loaded ${resp.length} currencies`)
+  } catch (error) {
+    logger.warn(
+      `Failed to load currencies, skipping loader. Original error: ${error.message}`
+    )
+  }
+}