feat(frontend): ✨ add group permissions (#721)

* style(frontend): 💄 add darktheme custom

* add dummy users in dev mode

* feat(frontend): ✨ add group permissions editor UI

* feat(backend): ✨ add group permissions setters

* test(backend): ✅ tests for basic permission get/set (WIP)

Needs more testing

* remove old test

* chore(backend): copy template.env on setup

* feat(frontend): ✨ enable send invitation via email

* feat(backend): ✨ enable send invitation via email

* feat: ✨ add app config checker for site-settings

* refactor(frontend): ♻️ consolidate bool checks

Co-authored-by: Hayden <hay-kot@pm.me>

frontend/pages/admin/dashboard.vue

@@ -1,5 +1,3 @@
-// TODO: Possibly add confirmation dialog? I'm not sure that it's really requried for events...
-
 <template>
   <v-container v-if="statistics" class="mt-10">
     <v-row v-if="statistics">