feat: shared loading state + cleanup loading state management (#5835)

* feat: implement shared loading bar component and polished loading states across the app

* feat: align loading states + ensureQueryData changes

* fix: lint + bugs

* fix: skeleton for manage servers page

* fix: merge conflict fix

apps/frontend/src/providers/setup.ts

@@ -3,6 +3,7 @@ import { provideNotificationManager } from '@modrinth/ui'
 import { FrontendNotificationManager } from './frontend-notifications'
 import { setupAuthProvider } from './setup/auth'
 import { setupFilePickerProvider } from './setup/file-picker'
+import { setupLoadingStateProvider } from './setup/loading-state'
 import { setupModrinthClientProvider } from './setup/modrinth-client'
 import { setupPageContextProvider } from './setup/page-context'
 import { setupTagsProvider } from './setup/tags'
@@ -15,4 +16,5 @@ export function setupProviders(auth: Awaited<ReturnType<typeof useAuth>>) {
 	setupTagsProvider()
 	setupFilePickerProvider()
 	setupPageContextProvider()
+	setupLoadingStateProvider()
 }