docs: added reference for JS Client (#1629)

* added reference for JS Client

* added reference for JS Client

* added reference for JS Client

docs/content/references/js-client/interfaces/internal.AxiosRequestTransformer.md

@@ -0,0 +1,28 @@
+---
+displayed_sidebar: jsClientSidebar
+---
+
+# Interface: AxiosRequestTransformer
+
+[internal](../modules/internal.md).AxiosRequestTransformer
+
+## Callable
+
+### AxiosRequestTransformer
+
+▸ **AxiosRequestTransformer**(`data`, `headers?`): `any`
+
+#### Parameters
+
+| Name | Type |
+| :------ | :------ |
+| `data` | `any` |
+| `headers?` | [`AxiosRequestHeaders`](../modules/internal.md#axiosrequestheaders) |
+
+#### Returns
+
+`any`
+
+#### Defined in
+
+packages/medusa-js/node_modules/axios/index.d.ts:10