Install pip inside the bbot venv

[TheTechromancer]

Since uv tool install doesn't install pip inside the virtualenv, we need to explicitly specify it in bbot's deps.

[github-actions]

🚀 Performance Benchmark Report

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91%. Comparing base (0c4063b) to head (928b09d).
⚠️ Report is 24 commits behind head on 3.0.

Additional details and impacted files

@@          Coverage Diff          @@
##             3.0   #3033   +/-   ##
=====================================
- Coverage     91%     91%   -0%     
=====================================
  Files        440     440           
  Lines      37366   37354   -12     
=====================================
- Hits       33865   33840   -25     
- Misses      3501    3514   +13     

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