Support more TTRPG systems

[fjallnari]

This meta-issue can be used as an overview of other potential systems to add with their accompanying licenses and SRD info.

Game system	License	Other info
Cypher System	CSOL	CSRD is freely avalaible as .docx document.
Worlds Without Number	None	Using game mechanics from the free version should be fine.
Eclipse Phase	CC BY-NC-SA 4.0	There is a SQL dump of character creation info in EPCC.
Mausritter	Third Party License	The Foundry module has all of the relevant info in objects.
Knave	CC BY 4.0
The Black Hack	OGL 1.0a	A lot is covered under the license, but it's the OGL.
24XX	CC BY 4.0	SRD is fair use, but there is not much meat to add to the VTT.
GUMSHOE	CC BY 3.0	SRD is fair use
Into the Odd	Mark of the Odd	SRD is fair use
Monolith (Cairn hack)	CC BY 4.0	Similar to Cairn, might need its own sheet though.
Dolmenwood	OGL?	System is being worked on right now. Devs shared some rules.
OSE	3rd Party License?	#86
Wanderhome	3rd Party License	Mechanics and game rules may be reused and referenced freely.
Shadowdark	3rd Party License	🚧 #127
Mothership	needs permission

Burning Wheel, Symbaroum and Tales from the Loop don't have a third party license, permission would have to be asked for.

Any other suggestions are welcome.