feat: crimbo 2008 penguin / elf drop rates

[midgleyc]

More item drop rate spading.

The ones marked c0 failed to drop at +4900, so they're conditional somehow, but I don't know specifics.

[codecov]

Codecov Report

Merging #1994 (68e7570) into main (e5866a9) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1994   +/-   ##
=========================================
  Coverage     36.94%   36.94%           
  Complexity    19241    19241           
=========================================
  Files          1088     1088           
  Lines        167114   167114           
  Branches      35403    35403           
=========================================
  Hits          61741    61741           
  Misses        95457    95457           
  Partials       9916     9916           

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