[Feature request]: Anchor property

[CodeDoctorDE]

Is your feature request related to a problem? Please describe

Scaling multiple elements could be problematic, if you put them in components, it can be a pain to use.

Describe your feature request!

Add anchors (like in godot) to all elements

https://docs.godotengine.org/en/stable/tutorials/ui/size_and_anchors.html

Anchor may be 4 floating number between 0 and 1 (top, left, bottom, right) and is the percentage to use.

Additional context

We don't need to touch any renderer, just make the select tool aware of these anchors and handle them accordingly.

This issue is currently on the "future" label, if you want to implement this, feel free to write a message here.

Code of Conduct

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