feat(controls): Add CheckBox animation

[Nuklon]

Pull request type

Please check the type of change your PR introduces:

• Update
• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes

What is the current behavior?

Replacement of #1511. The animation I've added is a little different from WinUI, which slides in from left to right. This is quite difficult to recreate in WPF. My initial idea to animate based on CheckBoxIconSize doesn't work reliably given the actual size is calculated based on the underlying glyph / TextBlock, and is sometimes larger. The new animation is now just a fade in based on opacity.

Wpf.Ui.Gallery_EMhJHl7yVJ.mp4

[Nuklon]

Thinking about it a little more, we can still do the idea of #1511, but now with the right properties to take the logical width into account.

[jschroedl]

@Nuklon I see that the CheckBoxAnimationFactorToValueConverter added (line 37) is not being used by the XAML. Is that a remnant or am I missing something?

<converters:AnimationFactorToValueConverter x:Key="CheckBoxAnimationFactorToValueConverter" />

Thanks a bunch for adding the animation BTW.

[Nuklon]

@Nuklon I see that the CheckBoxAnimationFactorToValueConverter added (line 37) is not being used by the XAML. Is that a remnant or am I missing something?

<converters:AnimationFactorToValueConverter x:Key="CheckBoxAnimationFactorToValueConverter" />

Thanks a bunch for adding the animation BTW.

Yes, thanks, this is indeed unused, I've created a PR to drop this.