Add ruff format and strip trailing whitespace

[klieret]

Closes #195

[codecov]

Codecov Report

Attention: Patch coverage is 67.46411% with 68 lines in your changes are missing coverage. Please review.

Project coverage is 76.06%. Comparing base (03f52ab) to head (b1ad80d).
Report is 1 commits behind head on main.

❗ Current head b1ad80d differs from pull request most recent head 98a634b

Please upload reports for the commit 98a634b to get more accurate results.

Files	Patch %	Lines
sweagent/agent/models.py	23.07%	20 Missing ⚠️
sweagent/agent/commands.py	15.78%	16 Missing ⚠️
sweagent/agent/agents.py	73.17%	11 Missing ⚠️
sweagent/agent/history_processors.py	50.00%	6 Missing ⚠️
sweagent/environment/swe_env.py	83.33%	5 Missing ⚠️
sweagent/environment/utils.py	83.33%	4 Missing ⚠️
run_replay.py	57.14%	3 Missing ⚠️
sweagent/agent/parsing.py	81.81%	2 Missing ⚠️
run.py	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #417      +/-   ##
==========================================
+ Coverage   75.97%   76.06%   +0.09%     
==========================================
  Files          18       18              
  Lines        2897     2883      -14     
==========================================
- Hits         2201     2193       -8     
+ Misses        696      690       -6     

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