Added item_generic from HL: Opposing Force & CS:CZ Deleted Scenes

[SmileyAG]

Splitted changes to several pull requests for easier comparisions.

Info

Alternative to cycler_sprite for placing decorative models, item_generic was exist in HL: Opposing Force and Counter-Strike: Condition Zero Deleted Scenes, so it also makes easier to port maps from that games.

FGD class:

@PointClass base(Weapon, Targetx) = item_generic : "Generic scenery item"
[
	model(studio) : "Model" : "models/testsphere.mdl"
	sequencename(string) : "Sequence Name" : "idle"
	skin(integer) : "Skin" : 0
	body(integer) : "Body" : 0
	
	spawnflags(Flags) =
	[
		1 : "Drop to floor" : 0
		2 : "Solid" : 0
	]
]