feat: set_default for Animation class

[christopher-hampson]

Overview: What does this pull request change?

Adds set_default class method to Animation class based on existing implementation for Mobject class.

Motivation and Explanation: Why and how do your changes improve the library?

Addresses issue #3142

Links to added or changed documentation pages

Further Information and Comments

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

[JasonGrace2282]

Hello, thanks for sending a PR for this feature :)
Off of a quick look, the implementation seems fine (I'll take a closer look, hopefully later this week). Would you mind adding some tests for this behavior?
Thanks for helping make Manim better ✨

P.S. Don't worry about the pre-commit failure. We'll fix that in a different PR.

[JasonGrace2282]

Just tested and it works for me! A simple test to add would be something like

def test_animation_set_default():
    s = Square()
    Rotate.set_default(run_time=100)
    anim = Rotate(s)
    assert anim.run_time == 100

Other than that, looks good to me :)

[christopher-hampson]

Just tested and it works for me! A simple test to add would be something like

def test_animation_set_default():
    s = Square()
    Rotate.set_default(run_time=100)
    anim = Rotate(s)
    assert anim.run_time == 100

Other than that, looks good to me :)

Thanks for reviewing and suggesting this test! I'll get this added shortly. 👍

[behackl]

Just some minor docstring formatting suggestions; I'll just apply these whitespace changes.

Thanks for your contribution!

[JasonGrace2282]

LGTM, thanks :)