up to py 3.11

margins only work if dpi set

add go

tidy

use uv to manage dependencies

Add option to flip horiz

Add script for large right margin

Fix image size calc and add unit tests

Fix typo in usage

Fix bug in readner_calendar_tables.py when dpi is passed on cli

Add blurb to README

Refactor

Auto-calculate DPI and margins from table

Add another size

Add more size settings