Ldraw example update

[gkjohnson]

Related issue: #22188

Description

• Fix some lint issues in webgl_loader_ldraw (double quotes -> single quotes).
• Remove outputEncoding = sRGBEncoding because the the loaded LDraw colors are sRGB.
• Remove envMapIntensity: 0.3 from LDraw material.
• Revert to use RoomEnvironment (and remove LDrawEnvironment) which is now bright enough with the above change.

BEFORE	AFTER

And for some more context here's how it would look if everything were converted to Linear color before rendering to sRGB output with ACES tone mapping:

cc @WestLangley

[Mugen87]

Seems the E2E screenshot for the example needs an update.

[mrdoob]

I'll merge and regenerate the screenshot.

[mrdoob]

Thanks!

[mrdoob]

@gkjohnson

And for some more context here's how it would look if everything were converted to Linear color before rendering to sRGB output with ACES tone mapping:

That looks very good!