feat(nc-gui): store sidebar states separately by id

# What's changed?

* use a sidebar id to identify the state
* use in memory storage to store the states
* use local storage to store persistent states
* add MemStorage class

packages/nc-gui/components/general/MiniSidebar.vue

@@ -4,7 +4,7 @@ import { computed, useGlobal, useProject, useRoute, useSidebar } from '#imports'
 
 const { signOut, signedIn, user } = useGlobal()
 
-const { isOpen } = useSidebar({ isOpen: true })
+const { isOpen } = useSidebar('nc-mini-sidebar', { isOpen: true })
 
 const { project } = useProject()