chore(): Reorganize modules (#7210)

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

packages/modules/api-key/src/joiner-config.ts

@@ -0,0 +1,31 @@
+import { Modules } from "@medusajs/modules-sdk"
+import { ModuleJoinerConfig } from "@medusajs/types"
+import { MapToConfig } from "@medusajs/utils"
+import ApiKey from "./models/api-key"
+
+export const LinkableKeys: Record<string, string> = {
+  api_key_id: ApiKey.name,
+}
+
+const entityLinkableKeysMap: MapToConfig = {}
+Object.entries(LinkableKeys).forEach(([key, value]) => {
+  entityLinkableKeysMap[value] ??= []
+  entityLinkableKeysMap[value].push({
+    mapTo: key,
+    valueFrom: key.split("_").pop()!,
+  })
+})
+
+export const entityNameToLinkableKeysMap: MapToConfig = entityLinkableKeysMap
+
+export const joinerConfig: ModuleJoinerConfig = {
+  serviceName: Modules.API_KEY,
+  primaryKeys: ["id"],
+  linkableKeys: LinkableKeys,
+  alias: [
+    {
+      name: ["api_key", "api_keys"],
+      args: { entity: ApiKey.name },
+    },
+  ],
+} as ModuleJoinerConfig