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/packages/docs-ui/src/layouts/main-content.tsx

@@ -1,9 +1,8 @@
 "use client"
 
 import React, { useEffect } from "react"
-import { useSidebar } from "../providers/Sidebar"
 import clsx from "clsx"
-import { MainNav, useIsBrowser, useLayout } from ".."
+import { MainNav, useIsBrowser, useLayout, useSidebar } from ".."
 
 export type MainContentLayoutProps = {
   mainWrapperClasses?: string