Add UiScale interpolator for UiTransform

[mnmaita]

Objective

• Contribute to the crate by adding the UiScale interpolator I'm using in one of my projects.

Solution

• Added UiScale interpolator and a few utility functions for constructing them (based off the Transform ones).

Testing

• I'm already using this in my project, but if additional testing is required please let me know.

[Multirious]

There seems to be issue with visibility indicated by the CI.

[mnmaita]

There seems to be issue with visibility indicated by the CI.

Thanks for the heads up! I think I've addressed the doc issues now. I've also removed some redundant properties in Cargo.toml based on some CI warnings. Feel free to revert that commit if you want to keep them.

[mnmaita]

@Multirious btw would you be able to update bevy_time_runner to Bevy 0.20 anytime soon? If you can handle that I can quickly draft a 0.20 update for this crate. Thanks!

[Multirious]

@Multirious btw would you be able to update bevy_time_runner to Bevy 0.20 anytime soon? If you can handle that I can quickly draft a 0.20 update for this crate. Thanks!

Yep, working on it at the moment. I'm just writing up a workflow to automate this.