docs: support multiple sidebars in a project (#11768)

* changed to new sidebar across projects except resources

* finalize multi sidebar support

* clean up

* remove redundant property

* small changes

* fixes

* generate

* fix error

* fix initial open

www/apps/user-guide/app/layout.tsx

@@ -64,13 +64,7 @@ export default function RootLayout({
       htmlClassName={clsx(inter.variable, robotoMono.variable)}
       gaId={process.env.NEXT_PUBLIC_GA_ID}
     >
-      <TightLayout
-        sidebarProps={{
-          expandItems: true,
-        }}
-        ProvidersComponent={Providers}
-        footerComponent={<Footer />}
-      >
+      <TightLayout ProvidersComponent={Providers} footerComponent={<Footer />}>
         {children}
         <Feedback className="my-2" />
         <EditButton />