Split app/core up into domain-oriented files

src/app/call/stores.ts

@@ -1,6 +1,6 @@
 import {Room as LiveKitRoom} from "livekit-client"
 import {derived, writable} from "svelte/store"
-import {type Room} from "@app/core/state"
+import type {Room} from "@app/groups"
 
 export type VoiceSession = {
   url: string

src/app/call/voice.ts

@@ -36,7 +36,8 @@ import {
   voiceState,
 } from "@app/call/stores"
 import {resetVideoCallLayout, triggerVideoFeedCount, videoPrimaryTileKey} from "@app/call/video"
-import {deriveLatestEventForUrl, deriveRoom, makeRoomId} from "@app/core/state"
+import {deriveLatestEventForUrl} from "@app/repository"
+import {deriveRoom, makeRoomId} from "@app/groups"
 import {pushToast} from "@app/toast"
 
 export const LIVEKIT_PARTICIPANTS = 39004