The functions square() and text() are not mentioned as related to rectMode()

[soegaard]

Issue description

The settings made by rectMode() affects how square() and text() interprets their arguments.

Therefore both square() and text() ought to be mentioned as related to rectMode().

URL(s) of affected page(s)

https://processing.org/reference/rectMode_.html

Proposed fix

Add square() and text() as related functions.