📝 Add utils.visualization Examples

[YijieZhu15]

• Add examples in docstrings for utils.visualization.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.70%. Comparing base (6ac6f55) to head (22faf09).
⚠️ Report is 13 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #943   +/-   ##
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  Coverage    99.70%   99.70%           
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  Files           71       71           
  Lines         9133     9133           
  Branches      1188     1188           
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  Hits          9106     9106           
  Misses          23       23           
  Partials         4        4           

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[Copilot]

Pull Request Overview

This pull request adds usage examples to several visualization utilities in tiatoolbox/utils/visualization.py.

• Adds Examples sections to the docstrings of:
  • random_colors
  • colourise_image
  • overlay_prediction_mask
  • overlay_probability_map
  • overlay_prediction_contours
  • plot_graph

Comments suppressed due to low confidence (2)

tiatoolbox/utils/visualization.py:355

• The example assigns to ax but return_ax=False returns the overlay array, not an axis. Rename the variable (e.g., overlay = overlay_probability_map(...)) or set return_ax=True to match the example.

        >>> ax = overlay_probability_map(

tiatoolbox/utils/visualization.py:628

• This comment references overlay_prediction_contours but should say plot_graph to match the function being demonstrated.

        >>> # Example usage of overlay_prediction_contours

[shaneahmed]

Thanks @YijieZhu15