Support connection to json_schema bindings from outlines

[torymur]

What behavior of the library made you think about the improvement?

We have json_schema parsing logic available.

How would you like it to behave?

Outlines suppose to use these exposed python bindings:

• build_regex_from_schema
• to_regex

Related issue in outlines: dottxt-ai/outlines#1227

Also potential of uniting these into one could be investigated.
Some additional python code might be required, unclear yet from which side.
Maybe some additional tests.

[rlouf]

The first thing to do is to confirm that the logic is exactly the same (check whether they share the same tests). If that's the case we can update Outlines.