refactor: rename Audio Room → Nest project-wide

Aligns class names, package paths, string resource keys, UI text and
intent actions with the Nests branding used by the EGG specs in
nestsClient/specs/. Mechanical rename — no behavior change.

- Folders: audiorooms/ → nests/ (5 paths across amethyst, quartz)
- 30+ class renames (AudioRoom* → Nest*, AudioRooms* → Nests*)
- String resource keys audio_room_* → nest_*
- UI strings "Audio Room"/"Audio Rooms" → "Nest"/"Nests" (incl. all locales)
- Intent extras AUDIO_ROOM_* → NEST_*
- Compose route Route.AudioRooms → Route.Nests

Spec-aligned identifiers (MeetingSpaceEvent, meetingSpaces/, the nip53*
packages) are intentionally untouched — those are NIP-53 protocol
names, not "audio room" branding.

https://claude.ai/code/session_01RDpuki4t8StSg1CZcXnV5b

nestsClient/src/jvmTest/kotlin/com/vitorpamplona/nestsclient/interop/NostrNestsMuteInteropTest.kt

@@ -51,7 +51,7 @@ import kotlin.test.fail
  *   - the broadcaster keeps the capture pump running while muted (so
  *     unmute is sample-accurate)
  *   - frames pushed during mute do NOT reach subscribers (`if (muted)
- *     continue` in [com.vitorpamplona.nestsclient.audio.AudioRoomMoqLiteBroadcaster])
+ *     continue` in [com.vitorpamplona.nestsclient.audio.NestMoqLiteBroadcaster])
  *   - frames pushed before / after the muted window DO reach
  *     subscribers, with the muted ones missing entirely (no silent
  *     placeholder frames)

nestsClient/src/jvmTest/kotlin/com/vitorpamplona/nestsclient/interop/NostrNestsRoundTripInteropTest.kt

@@ -23,7 +23,7 @@ package com.vitorpamplona.nestsclient.interop
 import com.vitorpamplona.nestsclient.NestsRoomConfig
 import com.vitorpamplona.nestsclient.OkHttpNestsClient
 import com.vitorpamplona.nestsclient.audio.AudioCapture
-import com.vitorpamplona.nestsclient.audio.AudioRoomMoqLiteBroadcaster
+import com.vitorpamplona.nestsclient.audio.NestMoqLiteBroadcaster
 import com.vitorpamplona.nestsclient.audio.OpusEncoder
 import com.vitorpamplona.nestsclient.connectNestsListener
 import com.vitorpamplona.nestsclient.connectNestsSpeaker
@@ -57,7 +57,7 @@ import kotlin.test.fail
  * (`MoqLitePublisherHandle`), the listener subscribes by speaker
  * pubkey (`broadcast=pubkey`, `track="audio/data"`), the speaker
  * pushes deterministic Opus-shaped payloads through the
- * [AudioRoomMoqLiteBroadcaster] pipeline, and the listener collects
+ * [NestMoqLiteBroadcaster] pipeline, and the listener collects
  * them via [SubscribeHandle.objects] (which the moq-lite adapter
  * wraps over `MoqLiteFrame` so existing decoder / player code keeps
  * working).