Mice heist rules updates (#31)

* Update with simpler Mice Heist rules
- No cheese tokens (but yes trash)
- Update food token values from 12/6/3 to 20/10/5
- Remove player chips
- Increase contribution markers from 4 to 8
- Placeholder for alternate random setup
- Simplify contribution rules text (since markers are only added 1 at a time and are never removed)
- Add language around skill card state/verbs: ready, exhausted, use, learn.
- Remove references to variable payout on obstacles
- Exhaust cards to assist
- Normalize on "use" term instead of "activate"
- Update fail/success rules (ready skills and gain trash on failure, place 1 marker and assisting gain trash on success)
- Remove all references to cheese on obstacles
- Trash are worth 2 points each, and are the tiebreaker
- Remove special language around "testing player"
- Remove special concept of "finale" obstacles (since obstacles only clear when passed)

Author: chrisglein