Bench export

[ATheorell]

Adding flag to export a .yaml file with benchmark results. This is particularly useful for creating standardized scoreboard entries

[codecov]

Codecov Report

Attention: Patch coverage is 16.12903% with 26 lines in your changes are missing coverage. Please review.

Project coverage is 67.93%. Comparing base (5c43542) to head (5aec1eb).
Report is 26 commits behind head on main.

Files	Patch %	Lines
gpt_engineer/benchmark/run.py	0.00%	9 Missing ⚠️
gpt_engineer/benchmark/bench_config.py	38.46%	8 Missing ⚠️
gpt_engineer/benchmark/__main__.py	0.00%	5 Missing ⚠️
gpt_engineer/benchmark/types.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1147      +/-   ##
==========================================
- Coverage   70.51%   67.93%   -2.59%     
==========================================
  Files          31       32       +1     
  Lines        1733     1818      +85     
==========================================
+ Hits         1222     1235      +13     
- Misses        511      583      +72     

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