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.

----

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

app/javascript/dashboard/components-next/sidebar/useSidebarKeyboardShortcuts.js

@@ -0,0 +1,39 @@
+import { useKeyboardEvents } from 'dashboard/composables/useKeyboardEvents';
+import { useRoute, useRouter } from 'vue-router';
+
+export function useSidebarKeyboardShortcuts(toggleShortcutModalFn) {
+  const route = useRoute();
+  const router = useRouter();
+
+  const isCurrentRouteSameAsNavigation = routeName => {
+    return route.name === routeName;
+  };
+
+  const navigateToRoute = routeName => {
+    if (!isCurrentRouteSameAsNavigation(routeName)) {
+      router.push({ name: routeName });
+    }
+  };
+  const keyboardEvents = {
+    '$mod+Slash': {
+      action: () => toggleShortcutModalFn(true),
+    },
+    '$mod+Escape': {
+      action: () => toggleShortcutModalFn(false),
+    },
+    'Alt+KeyC': {
+      action: () => navigateToRoute('home'),
+    },
+    'Alt+KeyV': {
+      action: () => navigateToRoute('contacts_dashboard'),
+    },
+    'Alt+KeyR': {
+      action: () => navigateToRoute('account_overview_reports'),
+    },
+    'Alt+KeyS': {
+      action: () => navigateToRoute('agent_list'),
+    },
+  };
+
+  return useKeyboardEvents(keyboardEvents);
+}