Port tg/paradise/good soft-edge lighting

Ports https://github.com/ParadiseSS13/Paradise/pull/6161
Its merged in nearly verbatim as far as the lighting module goes.
Changes outside the lighting module are merged based on our codebase.

code/modules/lighting/lighting_area.dm

@@ -0,0 +1,9 @@
+/area
+	luminosity           = TRUE
+	var/dynamic_lighting = TRUE
+
+/area/New()
+	. = ..()
+
+	if(dynamic_lighting)
+		luminosity = FALSE