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>

packages/medusa-react/mocks/handlers/admin.ts

@@ -1481,6 +1481,16 @@ export const adminHandlers = [
     )
   }),
 
+  rest.get("/admin/variants/:id", (req, res, ctx) => {
+    const { id } = req.params
+    return res(
+      ctx.status(200),
+      ctx.json({
+        variant: {...fixtures.get("product_variant"), id: id},
+      })
+    )
+  }),
+
   rest.get("/admin/variants/:id/inventory", (req, res, ctx) => {
     return res(
       ctx.status(200),