Refactor imports and remove legacy composables for improved code clarity

- Simplify imports in app.ts by removing unused SERVICE_TOKENS.
- Eliminate the NavigationItem interface in Navbar.vue as its functionality is now managed by useModularNavigation.
- Introduce new legacy composable stubs for useNostrChat and useRelayHub, indicating a shift towards modular chat and relay services.
- Update MyTicketsPage.vue to correct the import path for useUserTickets, enhancing module organization.
- Refactor ChatService to improve type handling for event tags, ensuring better type safety.

Remove ChatComponent, useNostrChat composable, and ChatPage for a modular chat architecture

- Delete ChatComponent.vue to streamline chat functionality.
- Remove legacy useNostrChat composable, transitioning to a more modular chat service approach.
- Eliminate ChatPage.vue as part of the refactor to enhance code organization and maintainability.

src/modules/events/views/MyTicketsPage.vue

@@ -1,7 +1,7 @@
 <!-- eslint-disable vue/multi-word-component-names -->
 <script setup lang="ts">
 import { onMounted, ref, watch } from 'vue'
-import { useUserTickets } from '@/composables/useUserTickets'
+import { useUserTickets } from '../composables/useUserTickets'
 import { useAuth } from '@/composables/useAuth'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'