* feat: use default input/output on chain switch

* feat(widgets): ErrorGenerator -> PropValidator

* default prop validation

* useDefaults hook

* pr feedback

* fix cosmos

* drop token map changes

* add default inputs to cosmos fixture

* set up different validation layers for widget and swap

* split widget/swap prop types

* cleanup

* pr feedback

* clear defaults when they're no longer valid on the current chain

* remove state checks on validators

* stop using address in cosmos fixture

* pr feedback

* useMemo on useSwapDefaults args

* tell the user what they gave to error'd props
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>