Message queue

[MadeByIToncek]

• Adding messages into queue
  • Addressed to a specific player
  • Addressed to player groups (hider/seekers)
  • Addressed to all players
• Fetching messages from the queue by players
• Read receipts for players
• Message "types"
  • Curse has been cast
  • Curse has been cleared
  • Request has been sent (todo Implement requests handling #15)
  • Request has been responded to (todo Implement requests handling #15)
  • Game event has happened (start, rest period, end, ...)