Add documentation page for Pressable component

[latekvo]

Description

This PR adds a documentation page for the new gesturized version of the Pressable component

[latekvo]

Please let me know if the gif is too big, small, dark or yellow.
Comparing it to components/buttons gif it's just the right color but larger,
comparing it to components/swipeable it's darker than it and similar size width-wise.

[latekvo]

To address the mixed capitalization - in other component docs like Reanimated Swipeable, Swipeable, Drawer Layout and Buttons, prop descriptions always (with few exceptions) start with a small letter while all the rest of the article uses letter capitalisation.

I applied this scheme to this page as well - prop descriptions start with a small letter while all the rest of the sentences start with capitalised ones.

[m-bert]

I'm not a fan of having so many admonitions. IMHO in that case they make docs less readable and people will pay less attention to the ones on other pages. I may be wrong though (cc @kacperkapusciak)

[m-bert]

LGTM, next time please make a separate PR to update example 😉

I'll take back Request Changes after @j-piasecki approval 😄

[j-piasecki]

Looks good

Please don't merge yet, same as with Swipeable - the docs will get published automatically after merge. We want to wait until it's released with that.