Better logging of print calls

[lkstrp]

Describe the feature you'd like to see

There are a couple of print() calls in linopy. When a model is infeasible, pypsa-eur calls model.print_infeasibilities(), which calls print_labels(), which prints the infeasibilities to stdout, but not to the logs.

Would it theoretically be possible to replace all print() calls in linopy, with logger.info()?

[FBumann]

@lkstrp
About that, I think it would be nice to have a method that creates the str only.
Im currently redirecting stdout to get the infos about the infeasibilities:

import io
from contextlib import redirect_stdout

f = io.StringIO()

# Redirect stdout to our buffer
with redirect_stdout(f):
    model.print_infeasibilities()

documentation['infeasible_constraints'] = f.getvalue()

I would benefit from such a change