Add fallback icon for domain template (#27814)

Author: wendevlin

src/data/icons.ts

@@ -12,6 +12,7 @@ import {
   mdiChatSleep,
   mdiClipboardList,
   mdiClock,
+  mdiCodeBraces,
   mdiCog,
   mdiCommentAlert,
   mdiCounter,
@@ -113,6 +114,7 @@ export const FALLBACK_DOMAIN_ICONS = {
   text: mdiFormTextbox,
   time: mdiClock,
   timer: mdiTimerOutline,
+  template: mdiCodeBraces,
   todo: mdiClipboardList,
   tts: mdiSpeakerMessage,
   vacuum: mdiRobotVacuum,