- Removed events.on_player_mined_item from outpost_builder because we don't want to add coins every time they mine and it's duplicated in player_stats.
- Removed events.on_player_mined_item from player_stats because it doesn't tell us what entity the items came from.
- Added coin tracking to events.on_pre_player_mined_item event instead. Checks if the mined item was a chest with coins in it and adds to the player stats if so.
- Tested that coins from trees and rocks still track when market is enabled
- While I was at it, added a pretty coin floating text for when RNG gives coins from mining trees/rocks
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