docs: added documentation for toast component changes (#7141)

* docs: added documentation for toast component changes

* added redirect from use-toast docs to upgrade guide

* remove unused file

* content linting fixes

* update UI package version

* updated ui preset

* fix upgrade guides main page

www/apps/ui/vercel.json

@@ -3,5 +3,11 @@
   "installCommand": "yarn install",
   "buildCommand": "turbo run build",
   "outputDirectory": ".next",
-  "ignoreCommand": "bash ../../ignore-build-script.sh"
+  "ignoreCommand": "bash ../../ignore-build-script.sh",
+  "redirects": [
+    {
+      "source": "/ui/hooks/use-toast",
+      "destination": "/upgrade-guides/medusa-ui/3-0-0"
+    }
+  ]
 }