feat(admin-ui, medusa-js, medusa-react, medusa): Multiwarehousing UI (#3403)

* add "get-variant" endpoint

* import from a different place

* fix unit test

* add changeset

* inventory management for orders

* add changeset

* initial create-fulfillment

* add changeset

* type oas and admin

* Move inv. creation and listing from admin repo

* Fix location editing bug (CORE-1216)

* Fix default warehouse on inventory table view

* remove actions from each table line

* Use feature flag hook instead of context directly

* remove manage inventory action if inventory management is not enabled

* Address review comments

* fix queries made when inventorymodules are disabled

* variant form changes for feature enabled

* move exclamation icon into warning icon

* ensure queries are not run unless feature is enabled for create-fulfillment

---------

Co-authored-by: Philip Korsholm <philip.korsholm@hotmail.com>
Co-authored-by: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>

.changeset/angry-trains-march.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/admin-ui": patch
+---
+
+add location support in fulfillment modal

.changeset/red-singers-swim.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/medusa": patch
+---
+
+feat(medusa): add get-variant endpoint

.changeset/violet-lobsters-retire.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/admin-ui": patch
+---
+
+Add order allocation to admin ui