feat: pass RTL flag to rules function

[kuzhelov]

This change is necessary for the sake of component styles being able to adapt to current presence of RTL mode.

As an example, suppose that we have a Chat Message component with the following layout

Relevant thing for us is the fact that 'timestamp' region has left padding, to ensure it won't overlap content of the 'author' area. However, in the RTL mode we would like this padding being applied on the right side of the component, not still on the left one:

But, unfortunately, at the moment we are unable to detect whether RTL is enabled from the 'rules' function. What would solve the problem is that if we would pass isRtl flag to rules functions, such that the following will be possible:

export default rules = () => {
  root: ({ isRtl }) => {
      padding: isRtl ? .. : ...
  }
}

[levithomason]

Consider comments and merge.

[levithomason]

Please destructure rtl at the top of the function with the other props.

I propose we don't rename props as they pass from the Provider to the theme. It adds unnecessary thinking to follow renames.

[levithomason]

Yep, this is required. Please see comment and then merge.

[kuzhelov]

comments are addressed

[codecov]

Codecov Report

Merging #109 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #109   +/-   ##
=======================================
  Coverage   69.94%   69.94%           
=======================================
  Files          74       74           
  Lines        1198     1198           
  Branches      227      227           
=======================================
  Hits          838      838           
  Misses        355      355           
  Partials        5        5

Impacted Files	Coverage Δ
src/components/Provider/Provider.tsx	52.38% <100%> (ø)	⬆️

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