🔧 weigh item usage by rough raw resource cost in objective function

[twentylemon]

Summary

Fixes https://github.com/duck-dynasty/duckbot/issues/958. The objective function is mostly unchanged by looking at it, but it should consider iron plates to be 1.5x more costly than iron ore, for example; instead of merely counting the rate of items produced. I wasn't able to think of a test case to show the theoretical bad behaviour. I may add some test cases in the future, or as we run into weird solves.

also fixed a bug in a recipe. #python.

Checklist

• [x] this is a source code change
  • [x] run format in the repository root
  • [x] run pytest in the repository root
  • [ ] link to issue being fixed using a fixes keyword, if such an issue exists
  • [ ] update the wiki documentation if necessary
• [ ] or, this is not a source code change

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 79.06977% with 9 lines in your changes missing coverage. Please review.

Project coverage is 95.99%. Comparing base (33a2a26) to head (bd868a6). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
duckbot/cogs/games/satisfy/solver.py	79.06%	0 Missing and 9 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #961 +/- ## ========================================== - Coverage 96.35% 95.99% -0.37% ========================================== Files 92 92 Lines 2115 2149 +34 Branches 234 252 +18 ========================================== + Hits 2038 2063 +25 Misses 65 65 - Partials 12 21 +9 ```

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