add huggingface demo url to homepage colivara cloud

[HalemoGPA]

Description

• Added Hugging Demo url as a button in homepage in Colivara.
• Updated discord invite link.

Type of change

• 🚨 Breaking change - causes existing functionality to break (triggers MAJOR version bump)
• ✨ New feature - adds functionality in a non-breaking way (triggers MINOR version bump)
• 🐛 Bug fix - fixes an issue without changing functionality (triggers PATCH version bump)
• 🏠 Internal - changes that don't affect external functionality (no version bump)
  (e.g., refactoring, docs, tests, admin site changes)

Release Impact

• Current version: v1.5.8
• Next version will be:

Checklist

• My code follows the style guidelines
• My code is tested with 99%+ coverage
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have updated the documentation to reflect my changes
• I have added/updated tests to cover my changes

Breaking Changes

Migration Guide

Additional Notes

This PR closes issue #115.