Rename .lua file to .luau

[RyanLua]

Description

Changes .lua files to .luau.

Related Issues

Changes Made

• Rename .lua files to .luau
• Cleanup some code so it doesn't break anything

Checklist

• [ ] I have tested these changes thoroughly.
• [x] I have reviewed my code for any potential errors or issues.
• [x] I have followed the code style guidelines for this project.

Additional Notes

Code of Conduct

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