For now, an example of using the API would be

>>> from manimpango import *
>>> l = Layout(markup="<span color='BLUE' font_family='Cursive'>Blue</span>")
>>> r = SVGRenderer('blue.svg', 100, 100, l, move_to=(25,25))
>>> r.render()
True

and an SVG file like this would be created.
blue.zip

@PhilippImhof does this look good? Any suggestions?

After implementing Image backend this is done :).

This looks very nice at the first glance. As it is a very substantial change (and step forward), I would like to take some time to really look at it in details.

Sure, you could look into this now or later when I complete the image backend. There are many codes that aren't used currently only the image backend will use it.

I think I would something from scratch rather than working on this. So closing.