[FIX] Admin Setting descriptions and Storybook (#15994)

* Fix regressions

* Split ConnectionStatusContext from ConnectionStatusProvider

* Split RouterContext from RouterProvider

* Split TranslationContext from TranslationProvider

* Update Storybook

* Refactor ConnectionStatusAlert

* Fix eslint issues

* Add SessionContext

* Add SidebarContext

* Fix RouterProvider

* Add useSubscription

* Deprecate ErrorAlert

* Prefer read unread from Session

* Add ToastMessagesContext

* Deprecate useSetSetting

* Fix SetupWizardRoute

* Fix ToastMessagesProvider

* Fix useSubscription

* Add Logo

* Add useIsMounted

* Refactor SetupWizardRoute

* Fix useReactiveValue loop

* Refactor SetupWizardState

* Add some skeleton components

* Add missing Storybook stories

* Add missing Storybook stories

* Refactor Storybook mocks

* Fix useIsMounted

* Refactor ConnectionStatusAlert styles

* Refactor ConnectionStatusContext

* Improve useObservableValue

* Remove some references to Meteor

* Add SettingsContext

* Remove some references to toastr and TAPi18n

* Fix translate.has function

* Remove superfluous argument

* Add storybook-static to gitignore

* Fix lint warnings

* Split providers from components

* Add UserContext

* Add AuthorizationContext

* Add useRole

* Add ServerContext

* Add missing hooks for client APIs

* Add helper to create observable values

* Add missing ServerProvider

* Don't trust the gap between initial value and autorun in reactive sources