Blender 4 Fixes

[augmero]

This PR addresses the following breaking changes:

https://wiki.blender.org/wiki/Reference/Release_Notes/4.0/Python_API

• FCurve.update() now also deduplicates the F-Curve's keys
• blf.size() dpi argument has been removed

Undocumented in blender release notes?

• space_data.auto_snap has been removed, it is now scene.tool_settings.use_snap_anim

Note

• More work may be needed if backwards compatibility is a requirement
• Not all animaide functionality has been tested

[Sobollion]

It works flawlessly, thanks @augmero!

[netricsa]

Thank you so much @augmero !!

[MihaMS]

Hello @augmero ! Can you please take a look at the issue that appear in Blender 4.1 #101 if you will have time... AnimOffset is really must have feature in my animation process.
Huge thank you!