Delete deprecated components and migrate to Sonner for toast system

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/components/MIGRATION_GUIDE.md

@@ -12,8 +12,6 @@ Standard UI component library for Object UI, built with Shadcn UI + Tailwind CSS
 - 🔌 **Extensible** - Easy to customize and extend
 - 🔄 **Sync Tools** - Scripts to keep components updated with latest Shadcn
 
-> **⚠️ Component Deprecations**: Some custom components are being phased out in favor of standard Shadcn patterns. See [MIGRATION_GUIDE.md](./MIGRATION_GUIDE.md) for details on migrating from deprecated components.
-
 ## Keeping Components Updated
 
 ObjectUI provides tools to sync components with the latest Shadcn UI versions: