Clarify Documentation Site & Project License policies

[andrewsu]

https://translator-developer-documentation.readthedocs.io/en/latest/about/license/ has a copy of the CC0 text, but it's not clear what that public domain declaration is referring to. Certainly not all the data/code in Translator is CC0, so the current display I think is likely to be misinterpreted by newbie users.

[RichardBruskiewich]

Hi @MarkDWilliams, can you perhaps ask Tyler et al. for an opinion on licensing of Translator in general but perhaps, this documentation in particular. Andrew's question is good although the CC0 licensing here is mainly to do with this documentation. Thanks in advance!