docs: add a need help button (#8069)

* docs: add a need help button

* change github issue link

* responsive fixes

www/apps/book/providers/index.tsx

@@ -3,6 +3,7 @@
 import {
   AnalyticsProvider,
   ColorModeProvider,
+  helpButtonNotification,
   HooksLoader,
   LearningPathProvider,
   MobileProvider,
@@ -28,7 +29,7 @@ const Providers = ({ children }: ProvidersProps) => {
           <ColorModeProvider>
             <ModalProvider>
               <LearningPathProvider>
-                <NotificationProvider>
+                <NotificationProvider initial={[helpButtonNotification]}>
                   <ScrollControllerProvider scrollableSelector="#main">
                     <SidebarProvider>
                       <PaginationProvider>