Mkdocs annotations fixes

[glenn-jocher]

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🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated documentation for distance calculation, heatmaps, and API usage with code and argument enhancements.

📊 Key Changes

• 📝 Improved example code blocks with added spaces for readability.
• 📐 Consistent formatting for argument tables (now using backticks for argument names).
• 🖋️ Minor text adjustments for better clarity and documentation standards.

🎯 Purpose & Impact

• 🧑‍🎓 Enables easier understanding for developers and users by improving code clarity.
• 📊 Helps maintain consistency across documentation, enhancing the overall user experience.
• 🚀 Potentially reduces confusion and improves usability of the Ultralytics APIs and features.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (22651d0) 77.20% compared to head (4f4549f) 39.58%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7600       +/-   ##
===========================================
- Coverage   77.20%   39.58%   -37.62%     
===========================================
  Files         117      117               
  Lines       14332    14332               
===========================================
- Hits        11065     5674     -5391     
- Misses       3267     8658     +5391     

Flag	Coverage Δ
Benchmarks	?
GPU	39.58% <ø> (-0.02%)	⬇️
Tests	?

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