Add an ai module

[giswqs]

This PR adds an ai module with the Genie class for using LLM in geemap.

The source code is adapted from the ee_genie.ipynb at https://bit.ly/3YEm7B6.
Credit to the original author Simon Ilyushchenko @simonff

from geemap.ai import Genie
Genie(
    gemini_model="gemini-1.5-flash",
    target_score=0.8,
    widget_height="600px",
)

[github-actions]

🚀 Deployed on https://66bc26aa989906137fe6519d--opengeos.netlify.app