feat: Automatic Prompt adaptation [language]

[shahules786]

Automatic prompt adaption for different languages.

• Add support for all metrics
• Testing and experimentation
• Add docs (with explanation)

To be merged only after #401

Usage

from ragas.metrics import faithfulness
faithfulness.adapt("hindi")
faithfulness.save()

[jjmachan]

• logging module instead of print
• that part of code in prompt.py that I didn't quite understand, it could be why cache is slow.

Also try to put in a bit more effort into variable names after the llm.generate step. more thoughtful var names can make a big difference in improving readability of the code esp after llm.generate because normally we have no idea what the output of that function is.

[jjmachan]

should this raise an exception or is it okay

[jjmachan]

leaving it as assert itself - with the assumption that there is no try - except method we can do to catch this.
the con is that the whole operation fails in this case. I think we should raise an Exception and catch it and throw a warning

[jjmachan]

I'll fix these things