feat: introduce dependency injection framework (#4091)

* feat: migrate frontend notifications to dependency injection based notificaton manager

* fix: lint

* fix: issues

* fix: compile error + notif binding issue

* refactor: move org context to new DI setup

* feat: migrate app notifications to DI + frontend styling

* fix: sidebar issues

* fix: dont use delete in computed

* fix: import and prop issue

* refactor: move handleError to main notification manager class

* fix: lint & build

* fix: merge issues

* fix: lint issues

* fix: lint issues

---------

Signed-off-by: IMB11 <hendersoncal117@gmail.com>
Signed-off-by: Cal H. <hendersoncal117@gmail.com>

apps/app-frontend/src/components/ui/AddContentButton.vue

@@ -1,11 +1,12 @@
 <script setup lang="ts">
-import { DropdownIcon, PlusIcon, FolderOpenIcon } from '@modrinth/assets'
-import { ButtonStyled, OverflowMenu } from '@modrinth/ui'
-import { open } from '@tauri-apps/plugin-dialog'
 import { add_project_from_path } from '@/helpers/profile.js'
-import { handleError } from '@/store/notifications.js'
+import { DropdownIcon, FolderOpenIcon, PlusIcon } from '@modrinth/assets'
+import { ButtonStyled, injectNotificationManager, OverflowMenu } from '@modrinth/ui'
+import { open } from '@tauri-apps/plugin-dialog'
 import { useRouter } from 'vue-router'
 
+const { handleError } = injectNotificationManager()
+
 const props = defineProps({
   instance: {
     type: Object,