Enhance logging

[jbriones1]

Description

The only logging we currently have is for tracking connects/disconnects for websockets. We should add some for game events.

We currently have logging for:

• Server initialization (handlers, port being listened to) in main.go
• Players registering in player.go: ServeRegister()
• Administrator registering admin.go: ServeRegister()
• Socket connects/disconnects socket.go: ServeHTTP/ServeViewer

Events to log

• Players connecting/reconnecting and the snapshot they receive.
• AntiPac and FROSH flag being found
• Players being removed.
• Failed reads/writes.
• Failed message sends/receives and who they were being sent to/received from.

Tasks

We can use the library log/slog to handle this. Use INFO, not DEBUG for messages that aren't errors/warnings.

• Add setter functions for game state fields and add the logging function there.
• Replace areas where those states are updated (game.state = <value>) to game.SetState(<value>)
  • Appending and removing from lists should have a similar pattern, but state if the item was missing if removal doesn't remove it.