feat(messenger): wire member management (add/remove/rename) + pull SDK 0.1.5

CrmMessagingAdapter implements addMember/removeMember/renameConversation over
crm.messenger.participant.add/remove + group.rename, powering the SDK's new
group/channel settings panel. listMembers maps customer role too.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "@abe-kap/appshell-sdk": "^0.2.6",
     "@insignia/iios-kernel-client": "^0.1.4",
-    "@insignia/iios-messaging-ui": "^0.1.4",
+    "@insignia/iios-messaging-ui": "^0.1.5",
     "clsx": "^2.1.1",
     "lucide-react": "^1.21.0",
     "next": "16.2.9",