RTL handbook - add any react specific documentation, other follow ups

[mcoker]

Looks like we should probably add something about

• Chart legends - feat(charts): add RTL legend support patternfly-react#9570 (comment)
• <Icon shouldMirrorRTL /> - https://github.com/patternfly/patternfly-react/blob/ff467eef5db530f0245ba29ca01db1f4a239f274/packages/react-core/src/components/Icon/Icon.tsx#L27-L30
• Anything about things that use popper?
• Link the mention of logical properties in the handbook to a docs page on what logical properties are (https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_logical_properties_and_values)
• Anything else?

cc @srambach @tlabaj @wise-king-sullyman @thatblindgeye @kmcfaul

[kmcfaul]

Charts info for RTL:

• Chart, ChartPie, ChartBullet, ChartDonut, ChartDonutUtilization all have a new legendDirection prop that should be set to rtl.
• In the case of user defined custom legends that pass custom label components, rtl support would have to be done manually as legendDirection does not apply.
• The ChartAxis representing the x-axis should additionally pass the invertAxis prop.