- Initial version.

This PR allows Hyve users to connect with their Qdrant account to get a much more increased Knowledge Base storage.

This PR adds Sitemap and Website crawling as a source for Knowledge Base.

### New Features
- **Choose Between GPT-3.5 and GPT-4o-mini**: Users can now select between GPT-3.5 and GPT-4o-mini for their interactions. GPT-4o-mini is much cheaper and provides better results.
- **Support for Rich Text in Chat Responses**: Chat responses now support rich text, allowing for enhanced results like images, links, and code snippets.
- **Website URL and Sitemap Crawling for Knowledge Base**: You can now add external content to your Knowledge Base, including data from your website and HelpScout docs, using Website URL and Sitemap Crawling.
- **Qdrant Integration for Improved Performance**: Users can now integrate with Qdrant to improve both performance and Knowledge Base limits. Qdrant's free plan offers liberal limits suitable for most websites.

### Improvements
- **PHP-tiktoken for Better Performance**: We’ve replaced js-tiktoken with php-tiktoken to significantly improve performance speed.
- **Minimum PHP Version Bumped to 8.1**: We’ve updated the minimum required PHP version to 8.1 to ensure better performance and security.