Add player logging

[Dashboy1998]

Context

• Currently the game does not announce when players join or leave nor is it logged

Choices

• Adding in logging as a background task

Test instructions

1. Start a server
2. Verify it logs it you leaving and joining in docker
3. With players in game test with others joining
4. Test multiple players joining within the same polling period
5. Delete player data, create a new players with any name that may break it (Spaces, commas, numbers, etc)

Output will look like

palworld-server  | Dashboy1998 has joined
palworld-server  | Broadcasted: Dashboy1998_has_joined
palworld-server  | Dashboy1998 has left
palworld-server  | Broadcasted: Dashboy1998_has_left

If #425 has been merged then the output will be

palworld-server  | Broadcasted: Dashboy1998_has_joined
palworld-server  | Broadcasted: Dashboy1998_has_left

Checklist before requesting a review

• I have performed a self-review of my code
• I've added documentation about this change to the README.
• I've not introduced breaking changes.

[thijsvanloef]

nice work!