Fix version: AI 2.37.0

Documenting the new Artificial Intelligence operator that now can be added via Assisted-Installer. 

Add the AI Operator to the following sections:

• 1.2 - Customizing your installation
• 3.4 - Installing Operators (UI)
• 4.5.1 - Installing Operators (API)
• 4.6.1 - Modifying Operators by using the API

Contacts:

• SME: Juan Hernandez
• QE: David Asulin