feat: Add new sidebar for Chatwoot V4 (#10291)

This PR has the initial version of the new sidebar targeted for the next major redesign of the app. This PR includes the following changes

- Components in the `layouts-next` and `base-next` directories in `dashboard/components`
- Two generic components `Avatar` and `Icon`
- `SidebarGroup` component to manage expandable sidebar groups with nested navigation items. This includes handling active states, transitions, and permissions.
- `SidebarGroupHeader` component to display the header of each navigation group with optional icons and active state indication.
- `SidebarGroupLeaf` component for individual navigation items within a group, supporting icons and active state.
- `SidebarGroupSeparator` component to visually separate nested navigation items. (They look a lot like header)
- `SidebarGroupEmptyLeaf` component to render empty state of any navigation groups.

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Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

app/javascript/dashboard/components/ChatList.vue

@@ -109,7 +109,7 @@ const chatListLoading = useMapGetter('getChatListLoadingStatus');
 const activeInbox = useMapGetter('getSelectedInbox');
 const conversationStats = useMapGetter('conversationStats/getStats');
 const appliedFilters = useMapGetter('getAppliedConversationFilters');
-const folders = useMapGetter('customViews/getCustomViews');
+const folders = useMapGetter('customViews/getConversationCustomViews');
 const agentList = useMapGetter('agents/getAgents');
 const teamsList = useMapGetter('teams/getTeams');
 const inboxesList = useMapGetter('inboxes/getInboxes');