feat: support histogram plot using maidr-ts

[dakshpokar]

Description

This PR adds support for histogram plots in py-maidr using maidr-ts engine. Please note that adding support for histogram 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 histogram plots using the maidr-ts engine and removes backwards compatibility with the maidr-js engine. Key changes include:

• Updating both Matplotlib and Seaborn examples to explicitly set the engine to "ts".
• Renaming histogram plot keys in the core enumeration to a camelCase format.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
example/histogram/matplotlib/example_mpl_hist.py	Updated engine setting to "ts" for Matplotlib example
example/histogram/seaborn/example_sns_hist.py	Updated engine setting to "ts" for Seaborn example
maidr/core/enum/maidr_key.py	Changed histogram key constants to camelCase format

Comments suppressed due to low confidence (1)

maidr/core/enum/maidr_key.py:38

• [nitpick] The updated key names now use camelCase (e.g., 'xMin') which differs from the previous naming convention; ensure that the rest of the codebase and documentation reflect this change for consistency.

X_MIN = "xMin"

[jooyoungseo]

LGTM. Go ahead and merge once ready.