Consider adding a separate keyvalue for naming light entities

[hexaflexahexagon]

Adding a name to light entities causes VRAD to treat them differently in the compiling process, though some people may want to name lights for organizational purposes and might not want them to be grouped together by VRAD. To fix this, we should consider adding another dummy keyvalue for lights that people can use for names. Or, adding a new keyvalue for VRAD and making 'name' be ignored by VRAD. Or, adding some sort of entity flag that does a similar thing. I personally like option number 1 the most.

Suggested by corny in the p2ce discord