ChangeModesOperation needs to send a notification that updates player fight/chase modes.

[jlnunez89]

Problem:

Currently, when a ChangeModesOperation is executed, the player who's fight and chase modes changed is not made aware of the changes, essentially desynchronizing the modes seen in the client.

Solution:

1. Create a new outgoing packet for OutgoingGamePacketType.PlayerModes under the namespace/folder Fibula.Communications.Packets.Outgoing:

   /// <summary>
   /// Updates a player's modes.
   /// </summary>
   PlayerModes = 0xA7,
   

2. Create a new packet writer under the namespace/folder Fibula.Protocol.V772.PacketWriters for that new packet.
3. Hook up the new packet writer in Fibula.Protocol.V772.CompositionRootExtensions class.
4. Finally, in ChangeModesOperation.Execute, add a new notification that sends the new packet to the player, to update their modes.

[jlnunez89]

Intentionally left up for grabs for any brave soul who wants to contribute to wet their feet.