add feature ephmeral message

fix wrapper swift

fix build windows

correct spelling and add useful logs

add events

fix indentation error

rename functions

Renamed expiredLifetime to expireLifetime + fixed long type in java wrapper

optimization of ephemeral message

Fixed issues in event logs filters

Added missing history size override

set expired time maximum by default

Added missing callback for ephemeral related event generated + moved ephemeral code to client-group-chat-room instead of chat-room

Added tag to epehemeral tests

fix expired time

remove useless item

fix spelling

Delete chat message from db before notifying the callbacks

Added ephemeral messages capability

Set ephemeral spec when creating Core

Started API to check if all participants in a chat room support ephemeral messages

Added callback on Core when an ephemeral message has expired

Use internal app directory as download path

Do not generate an ephemeral lifetime changed event when ephemeral feature is disabled

Changes regarding ephemeral time header used in CPIM

Fixed wrong callback called