RAC: Additional render props and docs improvements (#4755)
* export new types from RAC index.ts
* update RAC Tailwind example app
* add more exports
* update docs
* show optional props for Meter/ProgressBar table
* update various render props
* remove focus from various components
* fix searchfield test
* show optional in Checkbox/Combobox
* fix table row dragging docs table
* add more showOptional
* add state table for SliderTrack
* revert type updates
* add missing state table
* actual fix
* fix checkbox type
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Co-authored-by: Daniel Lu <dl1644@gmail.com>