Feature: Support auto-mirroring React icons

[behowell]

Feature request: microsoft/fluentui#25624

Tasks

Beta Give feedback

1. Add support for applying mirroring styles (transform: 'scaleX(-1)') when generating the React icon
2. Fill out the list of icons that should flip: rtl.txt (might need to create a new list -- check how this one is currently used)
3. (Maybe) Add a prop to control the flipping behavior (opt-out of auto-flipping)
4. Add support for conditionally rendering a different SVG based on RTL (e.g. BookQuestionMark24Regular => BookQuestionMarkRtl24Regular)
5. (Maybe) Export a function to create icons that swap SVGs based on RTL (similar to bundleIcon)