feat(dashboard,core,medusa,promotion): add campaigns UI (#7269)

* feat(dashboard,core,medusa,promotion): add campaigns UI

* chore: add without campaign choice to promotion ui

* chore: fix builds and types

* chore: fix design issues

* chore: address pr reviews

.changeset/healthy-shirts-lick.md

@@ -0,0 +1,7 @@
+---
+"@medusajs/promotion": patch
+"@medusajs/types": patch
+"@medusajs/medusa": patch
+---
+
+feat(dashboard,core,medusa,promotion): add campaigns UI