Support for new underground codespace on node beta

[AlignedCookie88]

Describe the feature you'd like Add support for node beta's new underground codespace (created using /p codespace underground create).

Has it already been considered? I've checked the existing issues. No other issues exist.

Does it fit CodeClient

• [x] Does it not affect gameplay, or anything outside DiamondFire?
• [x] Is it not in recode?

[GeorgeRNG]

This has been done, but it isn't assigned as latest because it's for beta: https://github.com/DFOnline/CodeClient/releases/tag/v149 I would also personally categorize this in a Bug Report.