Better type than any for context in onPress and onLongPress handlers.

[xdumaine]

Issue Description

Would love a better type than any for context in onPress and onLongPress handlers.

as is, context.showActionSheetWithOptions(...) doesn't have any typing.

[xdumaine]

Looks like the better type is IGiftedChatContext but it's not an easy type swap due to some internals of how it's passed around and used on TouchableOpacity events.

[xdumaine]

Related: the onPressAvatar doesn't get this param at all, as far as I can tell. It'd be useful (for action sheet). Using this doesn't work for me, weirdly it silently fails:

const { actionSheet } = useChatContext()

const onPressAvatar = useCallback((user: User) => {
  actionSheet().showActionSheetWithOptions(...) // Fails - no error, nothing shown
}, [...]);

onLongPress = useCallback((context: IGiftedChatContext, msg: IMessage) => {
  context.actionSheet().showActionSheetWithOptions(...) // works!
}, [...]);

[Varryme]

Great job