job description bullet enhancement endpoint

# Description
_As a_ front-end developer,
_I need_ an endpoint where I pass in a user's current bullet points and a job description,
_so that_ I can improve the bullet points with AI based on a job description

# Assumptions
- reuse as much of the existing classes and code as possible, maintaining the current abstractions
- create a prompt referring to the job description to join with the existing prompt

# Acceptance criteria
_Given_ the user is logged in and a valid job description and bullet points are passed in,
_when_ a request to the defined endpoint is made,
_then_ there should be a response with improved bullet points based on the job description, following the same body format as the current AI endpoint