feat: support boxplot using maidr-ts

[dakshpokar]

Description

This PR adds support for boxplot in pymaidr using maidr-ts engine. Please note that adding support for boxplot using maidr-ts eliminates backwards support using py-maidr with maidr-js engine.

Type of Change

• Bug fix
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[Copilot]

Pull Request Overview

This PR adds support for boxplot functionality using the maidr-ts engine while eliminating backwards support for the py-maidr/maidr-js engine. Key changes include removing the _extract_axes_data method, modifying the extraction of level data in plot generation, and updating outlier key naming to align with the new engine requirements.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
maidr/core/plot/boxplot.py	Removes _extract_axes_data and introduces level extraction logic for boxplots.
maidr/core/enum/maidr_key.py	Updates outlier key names for consistency with maidr-ts engine.
example/box/seaborn/example_sns_box.py	Sets the engine to "ts" for the seaborn boxplot example.
example/box/matplotlib/example_mpl_box.py	Sets the engine to "ts" and updates the boxplot orientation comment.

Comments suppressed due to low confidence (1)

maidr/core/plot/boxplot.py:158

• The 'levels' value extracted from self.ax might not be iterable as expected when used in the zip with whiskers, caps, medians, and outliers; ensure that extract_level returns an iterable of the same length or adjust the logic to match the expected data structure.

levels = (

[jooyoungseo]

LGTM! Merge once ready.