Consider switching the SVG backend

[Poikilos]

Use Inkscape's own Python module for the most compatibility.

Other SVG backends:

• cairosvg: https://stackoverflow.com/a/65298522
  • May match Inkscape's implementation (Inkscape uses Cairo; also, Inkscape is a member of the SVG working group)
• tksvg: https://github.com/TkinterEP/python-tksvg says Tk 8.7 adds SVG support. tksvg example: https://stackoverflow.com/a/77298684
  • example: https://stackoverflow.com/a/77298684
• svglib: https://stackoverflow.com/questions/55943631/putting-svg-images-into-tkinter-frame
• pylunasvg: https://stackoverflow.com/a/69487751
• svg-model: Pure Python
• pillow_svg
• wrap libsvg (C, used by Cairo, can't find Python wrapper)
  • SDL_svg fork doesn't rely on image libaries (raster formats not part of the SVG format anyway, just embeded)

Related issues:

• Consider switching to a different SVG backend hierosoft#14