feat(medusa-react,medusa,types,dashboard): added empty state + table for promotions list page (#6827)

what:

- adds empty state for promotions list page
- lists all promotions with pagination

<img width="1663" alt="Screenshot 2024-03-26 at 14 19 27" src="https://github.com/medusajs/medusa/assets/5105988/ed0d5c65-d003-40f5-b899-540970d892f5">


<img width="1664" alt="Screenshot 2024-03-27 at 20 46 17" src="https://github.com/medusajs/medusa/assets/5105988/4aa40f09-fe3f-4f34-af7a-f5c183254c76">

packages/types/src/common/common.ts

@@ -230,7 +230,7 @@ export type RequestQueryFields = {
  *
  * Fields included in the response if it's paginated.
  */
-export type PaginatedResponse = {
+export type PaginatedResponse<T = unknown> = {
   /**
    * The limit applied on the retrieved items.
    */
@@ -245,7 +245,7 @@ export type PaginatedResponse = {
    * The total count of items.
    */
   count: number
-}
+} & T
 
 /**
  * The fields returned in the response of a DELETE request.