Added ThreeJS documentation

[rmotafreitas]

Description ✏️

Closes No issue

Added ThreeJS documentation to preIndexedDocs.ts. This update includes:

• A new entry for ThreeJS in the preIndexedDocs object.
• Updated title, start URL, root URL, and favicon URL for better organization and navigation.

Checklist ✅

• I have added screenshots (if UI changes are present).
• I have done a self-review of my code.
• I have manually tested my code to ensure it works as expected with the new documentation entry.