Split thermals into several variations

[Lady Birb]

I, honestly, do not see why thermals need to be nerfed anymore, considering they already lost the ability to see players through walls and the current lighting system renders any and all items that improve night vision completely useless. Really, right now the only reason to even use thermals is if you already know there is a turbonerd cloaker running around. Thermals should be kept as they are, or given their wallhack vision back before we talk about nerfing them.