Threejs TS migration

[chicio]

Threejs TS migration

Description

Threejs TS migration

Motivation and Context

threes type checking

How Has This Been Tested?

browser

Types of changes

• Bug fix 🐛 (non-breaking change which fixes an issue)
• New feature ✨ (non-breaking change which adds functionality)
• Breaking change 💥 (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project 🍻.
• My change requires a change to the documentation 💡 and I have updated the documentation accordingly.
• I have read the CONTRIBUTING document 👥.
• I have added tests to cover my changes 🎉.
• All new and existing tests passed ✅.