[WIP] script to merge french translations into the XML

Almost all of this commit was generated by Junie with the following prompt (and later refined for adding cases to skip inserting the french stuff, and forcing it to keep whitespaces, escapes, etc):
> generate a script (python, for instance) to properly insert into the xml file the french tokens (`<lang code="fr" ...`) from the data in `programs_tokens.csv`

Author: adriweb