Feature: add Image handling mode option for AI Agent action

Added

Image Handling Mode for AI Agent Actions: Introduced a new Image Handling Mode setting to control how the AI Agent processes incoming images from users.
- Available options allow AI Agents to either:
  - Wait for user instruction before processing images.
  - Automatically process images as part of the conversation flow.
- Helps in managing AI agent behavior with multimedia inputs for better context handling.

Added a new dropdown field under AI Agent configuration for selecting the desired image handling mode.
Includes tooltips and helper text for clarity on behavior.

🖼️ Gain more control over how your AI Agent handles images during conversations!