[Suggestion] Add limitation to where new custom nodes can be ran at

[matt4499]

Suggestion

For example, If I create a new node library, I could set it to only run on a gamemode called "TTT" or maybe only used with an addon named "ulx" This would be good for ensuring maybe any errors wont occur, or perhaps if you don't want your node library running on a certain gamemode, or beside a certain addon.