feat(admin, admin-ui, medusa-js, medusa-react, medusa): Support Admin Extensions (#4761)

Co-authored-by: Rares Stefan <948623+StephixOne@users.noreply.github.com>
Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/medusa-js/package.json

@@ -48,7 +48,7 @@
     "@types/uuid": "^9.0.0",
     "jest": "^27.4.7",
     "ts-jest": "^27.1.5",
-    "tsup": "^6.5.0",
+    "tsup": "6.7.0",
     "typescript": "^4.9.5"
   },
   "gitHead": "cd1f5afa5aa8c0b15ea957008ee19f1d695cbd2e",