Support for RTL layouts

[Tinggaard]

Currently the package does not support LTR layouts

This breaks the layout:

#import "@preview/drafting:0.2.1": *

#set page(width: 10cm, height: 5cm, margin: (right: 2cm))
#set text(dir: rtl)

#set-page-properties()

#lorem(10)
#margin-note[I break layouts]