[APP-1310] Button refresh (#8758)

* Rm gradient buttons from Storybook

* TEMP move storybook button section

* Remove gradient_sky

* Remove actual defs for gradient_sky and gradient_primary

* Remove other gradient defs

* Remove gradient support entirely

* Deprecate 'variant' in favor of 'color'

* Fork base styles codepath to make variant deprecation more obvious

* Remove text styles for when no color is set, never been used

* Fork text styles codepath to make variant deprecation more obvious

* Revert temp storybook commit, remove deprecated values

* Replace remaining gradient button usage

* Update Buttons storybook section

* Update tiny styles

* Update small styles

* Update large sizes

* Ensure proper alignment of buttons in storybook

* Update button colors

* Rename negative_secondary to negative_subtle

* Remove unnecessary select()

* Update icon size and gap

* Update negative_subtle styles

* Custom button colors

* Add borderCurve

src/components/live/EditLiveDialog.tsx

@@ -240,7 +240,7 @@ function DialogInner({
             label={_(msg`Remove live status`)}
             onPress={() => removeLiveStatus()}
             size={platform({native: 'large', web: 'small'})}
-            color="negative_secondary"
+            color="negative_subtle"
             variant="solid"
             disabled={isRemovingLiveStatus || isGoingLive}>
             <ButtonText>