[web] Tear down old editor toolbar GitOrigin-RevId: 8ba74abcc56e7bd476a9d6cae72f38486168c2ed
* feat: integrate main layout, toolbar, and rail from redesign into main ide-react folder * feat: remove additional files no longer used after ide redesign GitOrigin-RevId: 8fd77f63cb9c67be91995a9dde13b0fe2376d80f