Player UI events

[Ymihere03]

Created a UI element that shows timed elements when players get kills and which weapon scored the kill

• Uses the format: "Killer Name" [weapon icon] "Killed Name"
• UI Element stays visible for about 8 seconds (480 frames, not user-configurable)
  then is removed automatically
• The number of events that can display on screen is capped at 20
• Added config 'hudShowKillFeed'
  • If true, show new kill feed ui element and do not show kill messages in the message box
  • If false, do not show kill feed ui element and show kill messages in the message box

Example screenshots:

Added internal score events for ball games and zone capture games

• These events don't have UI notifications yet

Direction arrow style no longer crashes Avara when changed between games

Optional TODO

• Need better event icons. Current ones don't blend well into the UI
• Detection for other in game events
• Need icons for more events: wall/environment crush, ball score, zone control
• Make sprite file loading more configurable (for aftershock)