Refactor App layout and introduce new components for improved organization

- Replaced the main layout in App component with AppFrame for better structure.
- Introduced MainEditor component to encapsulate the main editing interface, including ProfileList and HistoryTable.
- Added ModelsTab component to manage model-related functionalities.
- Updated Sidebar to include a new Models tab for navigation.
- Removed unused components and streamlined the layout for enhanced user experience.

app/src/components/ServerTab/ServerTab.tsx

@@ -1,5 +1,4 @@
 import { ConnectionForm } from '@/components/ServerSettings/ConnectionForm';
-import { ModelManagement } from '@/components/ServerSettings/ModelManagement';
 import { ServerStatus } from '@/components/ServerSettings/ServerStatus';
 import { UpdateStatus } from '@/components/ServerSettings/UpdateStatus';
 import { isTauri } from '@/lib/tauri';
@@ -12,7 +11,6 @@ export function ServerTab() {
         <ServerStatus />
       </div>
       {isTauri() && <UpdateStatus />}
-      <ModelManagement />
       <div className="py-8 text-center text-sm text-muted-foreground">
         Created by{' '}
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