fix(medusa, core-flows): Update TIP on promotions (#12885)

* fix: Update TIP on promotions

* Create warm-rings-look.md

* only show for fixed discounts

* fix: handle type change

---------

Co-authored-by: fPolic <mainacc.polic@gmail.com>
Co-authored-by: Frane Polić <16856471+fPolic@users.noreply.github.com>

packages/core/types/src/http/promotion/admin/payloads.ts

@@ -197,6 +197,10 @@ export interface AdminUpdatePromotion {
    * by entering the code at checkout.
    */
   is_automatic?: boolean
+  /**
+   * Whether the promotion is tax inclusive.
+   */
+  is_tax_inclusive?: boolean
   /**
    * The type of promotion.
    */

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

@@ -168,6 +168,11 @@ export interface UpdatePromotionDTO {
    */
   type?: PromotionTypeValues
 
+  /**
+   * Whether the promotion is tax inclusive.
+   */
+  is_tax_inclusive?: boolean
+
   /**
    * The status of the promotion:
    *