Implement collection category for skins

[crashzk]

Simple, it would be to implement category option for skins, currently the configurations of skins are like this:

	"Ancient Ritual"
	{
		"index"		"1034"
		"classes"	"weapon_g3sg1;"
	}
	"Carved Jade"
	{
		"index"		"1033"
		"classes"	"weapon_aug;"
	}
	"Dusk Ruins"
	{
		"index"		"1032"
		"classes"	"weapon_galilar;"
	}

With the collection system it would look like this:

	"Ancient Ritual"
	{
		"index"		"1034"
		"classes"	"weapon_g3sg1;"
		"collection"	"Case Broken Frag"
	}
	"Carved Jade"
	{
		"index"		"1033"
		"classes"	"weapon_aug;"
		"collection"	"Case Broken Frag"
	}
	"Dusk Ruins"
	{
		"index"		"1032"
		"classes"	"weapon_galilar;"
		"collection"	"Case Broken Frag"
	}

Or something like this:

"Case Broken Frag"
{
	"Ancient Ritual"
	{
		"index"		"1034"
		"classes"	"weapon_g3sg1;"
	}
	"Carved Jade"
	{
		"index"		"1033"
		"classes"	"weapon_aug;"
	}
	"Dusk Ruins"
	{
		"index"		"1032"
		"classes"	"weapon_galilar;"
	}
}

When the player opened the skin menu, he would have the option to choose skins by collection, then there would be the names of the collections.

It would also be interesting if this collection option could create custom collections, with custom collections names.

I believe something similar to the gloves plugin, which has the gloves separated by a collection of gloves.

[kgns]

This sounds like a nice improvement. If anyone wants to implement this for this plugin, I can modify the config generator repository to match the format required.