Enhancements in code and readme

[shikha1970]

Description

1. Changes in tool to make it in line with latest assistant API. No longer accepets model and returns attributes in function definition.
2. Enhanced prompt for html table support
3. Enhance frontend code for html table support
4. Enhanced readme for better usability

Checklist

• I have read the contribution guidelines
• I have coordinated with the docs team (mldocs@microsoft.com) if this PR deletes files or changes any file names or file extensions.
• This notebook or file is added to the CODEOWNERS file, pointing to the author or the author's team.