Add Integration with a Large Language Model (LLM) for Help with Creating XPath Expressions from XML Snippets

[gkapfham]

One of the most challenging tasks associated with using Chasten is that a person
must write their own XPath expressions in order to query the AST of a Python
program. It would be ideal if Chasten could provide some support for
automatically creating the XPath expressions for a specific query.

One option that we should consider is giving a person who uses Chasten the
option of providing an OpenAI key and then sending some XML and a natural
language description of a query to OpenAI ChatGPT-3.5-turbo. We could then return
back an XPath expression that is likely to meet the query and then give the
person using the tool the option of adding it to their checks.yml
configuration file.