Add stats, history, ... 📜

[ymyke]

• Add stats to game state: number of fights won, locations visited, number and which
  cards defeated, which cards confronted with, ...
• Add history to runs, and all histories need to be saved.
• Each card should track how often it has been used, how often it has been successful in fights, ...

Implementation

• Track stats with each "thing" (card, location, etc.) in a specific stats class? But: Keep in mind that some cards can die during a run but should still keep their stats available.
• Or maybe just the entire run in some useful format? (Would replace log and maybe also the stateslogger)