feat: allow custom react element for S2 Picker value (#9541)
* feat: add types for renderValue prop
* initial impl of renderValue
* remove css restriction on non-slot elements
* clamp picker value height
* test: renderValue displays selected items correctly
* docs: document renderValue usage
* docs: improve docs example
* fix render without picker item
* lint and type fix
* more real life example
* fix accessibility warnings
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Co-authored-by: Alastair Choo <achoo@adobe.com>
Co-authored-by: Robert Snow <rsnow@adobe.com>
Co-authored-by: Robert Snow <snowystinger@gmail.com>