Add chat and celebration code

[FormularSumo]

https://github.com/RLBot/RLBotPythonExample/wiki/Quickchat

[FormularSumo]

• Say 'I got it' when going for kickoff
• Say defending if joint closest but not going for ball (because on right)
• If another bot says 'I got it' on kickoff say 'Defending' and don't go for kickoff
• Say waste of CPU cycles if win by 3x goals with at least 2 goals
  Only uses team info quickchats when len(agent.friends) > 0