[BF4] handle comrose chat id's as event

This commit create a new Event `EVT_CLIENT_COMROSE`. The data include the ComRose Message ID. The defined chat ids will not pass other events like `EVT_CLIENT_SAY`.

This can be used in plugins. If a player uses in the game the ComRose then will b3 trigger the event `EVT_CLIENT_COMROSE` and pass the CHAT_ID as data.

For what can you use it?
For example, B3 could be a command to confirm. 
The player chooses in his ComRose "Confirmation"