Comment difference rough vs estimate

[GuilhemN]

Following a private email discussion with Martin and others, I would suggest adding a comment in the README about the main API and the cost models in use throughout the codebase.

I was quite confused that rough uses [ADPS16] by default, but the rest of the code rather relies on [MATZOV] for the concrete cost of lattice reduction.

[GuilhemN]

Thanks for your feedback! I updated the pull request to take it into account, I hope that's better now :)

[malb]

Great! A few CI failures to take care of but otherwise good to go. Thank you!

[GuilhemN]

Perfect! Should be good now

[malb]

Ta!