fix(medusa): import and use RequestQueryFields from types package (#7275)

Noticed that `RequestQueryFields` is defined in both the `medusa` and `types` package. Within the `medusa` package sometimes it uses the local type definition or the definition in `types`.

This PR removes the type definition of `RequestQueryFields` in `medusa` and uses that in `types` instead.

packages/core/types/src/common/common.ts

@@ -201,11 +201,14 @@ export type QueryConfig<TEntity extends BaseEntity> = {
 export type RequestQueryFields = {
   /**
    * Comma-separated relations that should be expanded in the returned data.
+   * @deprecated Use `fields` instead and the relations will be inferred
    */
   expand?: string
 
   /**
    * Comma-separated fields that should be included in the returned data.
+   * if a field is prefixed with `+` it will be added to the default fields, using `-` will remove it from the default fields.
+   * without prefix it will replace the entire default fields.
    */
   fields?: string
 
@@ -220,7 +223,7 @@ export type RequestQueryFields = {
   limit?: number
 
   /**
-   * Field to sort items in the list by.
+   * The field to sort the data by. By default, the sort order is ascending. To change the order to descending, prefix the field name with `-`.
    */
   order?: string
 }