Swarm: add getConversationsInfo() with title + avatar + mode
Done
Store title/subtitle/avatar into /profile.vcf
add commit type application/profile-update
Merge conflicts solver. Force merge profile with higher commit
add getConversationsInfos/setconversationInfos
Add details in conversationsRequests()
Commit verification, verify that only profile.vcf is modified
Tests: check add profile, merge with conflicts, , check request in addContact & addConversationMember, only admin can update, no bad file, validateAdminUpdates
