Update examples to use :class:~.Axes and deprecate :class:~.GraphScene

[hydrobeam]

Changelog / Overview

:class:~.GraphScene has been deprecated and its functionality has been shifted to :class:~.Axes. See the updated example gallery for sample usage.

Motivation

This is the final step in shifting over completely to Axes/CoordinateSystem away from GraphScene

Explanation for Changes

The examples that use GraphScene in the example gallery were updated. They all kept the same visuals, except for HeatDiagramPlot, which had its tick count reduced.

Documentation Reference

Testing Status

Further Comments

This PR is dependent on #1472

Checklist

• I have read the Contributing Guidelines
• I have written a descriptive PR title (see top of PR template for examples)
• I have written a changelog entry for the PR or deem it unnecessary
• My new functions/classes either have a docstring or are private
• My new functions/classes have tests added and (optional) examples in the docs
• My new documentation builds, looks correctly formatted, and adds no additional build warnings

Reviewer Checklist

• The PR title is descriptive enough
• The PR is labeled correctly
• The changelog entry is completed if necessary
• Newly added functions/classes either have a docstring or are private
• Newly added functions/classes have tests added and (optional) examples in the docs
• Newly added documentation builds, looks correctly formatted, and adds no additional build warnings

[sebpearce]

Just wanted to say thanks for the effort here. I am just learning about graph stuff now and having up-to-date docs really helps.

[behackl]

Purely based on looking at the rendered output: looks great, and IMO ready to ship. I have added one non-blocking comment.

[Nikhil0504]

LGTM