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

packages/ui/src/composables/index.ts

@@ -13,6 +13,9 @@ export * from './server-console'
 export * from './server-manage-core-runtime'
 export * from './sticky-observer'
 export * from './terminal'
+export * from './use-loading-bar-token'
+export * from './use-loading-state-core'
+export * from './use-ready-state'
 export * from './use-server-image'
 export * from './use-server-project'
 export * from './virtual-scroll'