Wrapper around search API

[RamiAwar]

🚀 Feature Request

Search API could use many improvements:

• Iterating over search results
• Transforming search results into list of model instances directly
• More user friendly interface to search results
• Executing particular search directly from session API ex. session.exec() (not sure if this yields any benefits over normal execution, might be a little too inspired by sqlalchemy for no real reason here)
• Query DSL is needed to make filtering more user friendly (maybe cover base search capabilities only?)
• Make internal es client more easily accessible for more complex usage