Add missing typo definition for DebugEnvironment

[skyclouds2001]

Why

add missing typo definition

What

create DebugEnvironment.d.ts

See https://github.com/mrdoob/three.js/blob/master/examples/jsm/environments/DebugEnvironment.js

Also, fix the incorrect format in .all-contributorsrc file.

Checklist

• Checked the target branch (current goes master, next goes dev)
• Added myself to contributors table
• Ready to be merged

[Methuselah96]

@skyclouds2001 Thanks for the PR! Looks like DebugEnvironment.d.ts needs to be added to types/three/OTHER_FILES.txt since there are no tests that reference it.

[Methuselah96]

Thanks!