Added example for path_arc keyword argument of :class:.Transform

[kjlubick]

Overview: What does this pull request change?

This was very handy for me when trying to swap two parts of an equation around without them getting muddled together first. Thus, I want it to be more clear how to use the path_arc feature of Transform, so I added an example showing how the different angles change the movement path.

Links to added or changed documentation pages

Transform Page

TransformPathArc.mp4

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[MrDiver]

This looks good. Thank you for your work! But i'm not sure if we can support more Animations in the Documentation right now. @behackl might take a look in a few days. Till then we will just keep this here till we know for sure.

[ad-chaos]

But you can add it as a template though!
https://github.com/ManimCommunity/manim/tree/main/manim/templates

[behackl]

This looks very fine to me! The example adds ~1.4 sec build time to the documentation which is fine I guess (we can always ask for more build time allowance if we need it).

I've left a bunch of suggestions and comments, please take a look.

[kjlubick]

Thank you for the excellent suggestions.

[kjlubick]

Anything else to address?

[behackl]

LGTM, thank you!