Enhance AOAI / AI Studio Model Catalog Custom Skill

[farzad528]

Purpose

Changes Made

• [x] Refactored the custom skill endpoint to improve readability and maintainability.
• [x] Introduced a new ScenarioType Enum for better scenario management.
• [x] Added custom logging throughout the code to assist in debugging and monitoring.
• [x] Improved error handling using the CustomSkillException class for clearer error messaging.
• [x] Implemented a new method to load prompts from a JSON file, enhancing flexibility.
• [x] Introduced a health check endpoint to ensure service availability.
• [x] Added functionality to handle image data in the image captioning scenario with validation for base64 content.
• [x] Enhanced response formatting to accommodate different scenarios (summarization, entity recognition, image captioning).
• [x] Ensured compatibility with Azure's new chat completion client.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone https://github.com/farzad528/azure-search-power-skills/tree/main
cd azure-search-vector-samples
git checkout main
deploy the new Functions 

• Test the code

  # Replace with specific test commands or instructions as needed

What to Check

Verify that the following are valid

• Ensure that the new custom skill functionality works correctly for all scenarios (summarization, entity recognition, image captioning).
• Confirm that error handling and logging are functioning as expected.

Other Information

• This update ensures compatibility with the latest Azure chat completion client and improves the overall user experience.

[amitkalay]

Hey @farzad528 - there are merge conflicts with this PR because of my recently merged changes. Can you please resolve those conflicts and resubmit this PR?

[farzad528]

@amitkalay I've overrided