fix(system): add aria-disabled to the disabled state

[AlfonzAlfonz]

xstyled has disabled state which allows to style elements which support disabled attribute, unfortunately if I want to render button as an link I need to use "aria-disabled" attribute. Solution is straightforward, change the disabled state so it includes &[aria-disabled=true]. I know that I can make the change locally in the theme, but I think it is important to include it in the library.

Summary

Chakra ui has similar concept to the states and their implementation of disabled includes. https://chakra-ui.com/docs/features/style-props#pseudo

Test plan

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Codecov Report

Merging #297 (4cc2a74) into main (250d21f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #297   +/-   ##
=======================================
  Coverage   92.74%   92.74%           
=======================================
  Files          60       60           
  Lines        1255     1255           
  Branches      244      244           
=======================================
  Hits         1164     1164           
  Misses         91       91           

Impacted Files	Coverage Δ
packages/system/src/defaultTheme.ts	100.00% <ø> (ø)

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[agriffis]

unfortunately if I want to render button as an link I need to use "aria-disabled" attribute

Could you explain this?

[AlfonzAlfonz]

Yeah, here is a simple use case. Sometimes I need to create button, but I can't use the button element and if I want to make it disabled I need to use aria-disabled attribute.

https://codesandbox.io/s/angry-matsumoto-huzym?file=/src/App.js

[gregberge]

Hello @AlfonzAlfonz, can you update documentation? I think there is a page where it is described.

[AlfonzAlfonz]

Docs should be updated now :)

[gregberge]

Thanks!