Licenses of models

[miro-janosik]

Hi, I was looking for a list of licenses of language models and I could not find any.
That's why I did go through all the model readme's and made a table of the model sources, with their licenses.
I have listed the table here: https://github.com/miro-janosik/argos-translate-licenses/blob/main/README.md

I still need to work on it a bit, there are few sources where I can't find licensing requirement. Two models do not have any sources stated (Portugese-Spanish, Spanish-Portugese). And two models use sources that can't be used for commercial or non-research purposes (Russian-English, English-Russian).

Any suggestions/updates to the table are welcome.