Update tbshotgun mdls with skinfamillies/lods , add pbr materials

[CozyMerc]

• Both ptpov and w_ models now have proper skinfamillies resembling average r2 weapon setup (default/skin31/prime 0-6)
• added lod0-lod3 models to the w_ model
• removed references textures and models referencing weapons which were used as base for tb.
• rpak is now only 1024x for tb, shell is 512x.
• rpak now fully supports r2 pbr
• rpak now contains newly created skin31 material + dummy materials for prime skins 1-6 to prevent missing texture issues
• Replaced missing audio events with already existing sounds:

	format
	{old event}
	{new event}
	open
	{ event AE_CL_PLAYSOUND 4 "SG_Twin_B.Reload_Open" } 
 	{ event AE_CL_PLAYSOUND 3 "wpn_softball_reload_start_mech_fr05_1p" } 
        eject
	{ event AE_CL_PLAYSOUND 8 "SG_Twin_B.Reload_Eject" } 
	{ event AE_CL_PLAYSOUND 0 "Weapon_Sidewinder_Reload_1_1P" } 
	load shell
	{ event AE_CL_PLAYSOUND 20 "SG_Twin_B.Reload_InsertMag" } 
	{ event AE_CL_PLAYSOUND 8 "Weapon_Mastiff_Reload_LoadShell" } 
	close
	{ event AE_CL_PLAYSOUND 19 "SG_Twin_B.Reload_Close" }
	{ event AE_CL_PLAYSOUND 28 "Weapon_RE45_Reload_MagInsert" } 
	draw
	{ event AE_CL_PLAYSOUND 0 "SG_twinB.Draw" }
	{ event AE_CL_PLAYSOUND 0 "Weapon_R101_Equip" } 
	holster
	{ event AE_CL_PLAYSOUND 0 "SG_twinB.Holster" }
	{ event AE_CL_PLAYSOUND 0 "Weapon_R101_UnEquip" } 

[CozyMerc]

Since I used lod positions from wingman, db started looking wonky when swapping lods. Mostly in third person.

I tested the lod25 pos in PMs and it works perfectly, the lod still swaps in tpp @110fov w/o zoom, but as soon as you ads with any weapon it swaps to lod0.

tldr: corrected uvs and made sure lod swaps are seamless. https://youtu.be/8m4CPCPeKds

[GeckoEidechse]

@EM4Volts

[EM4Volts]

Looks fine ingame, didnt realize there were actual sound events for the db ingame, even fitting the reload perfectly. Guess respawn had the model done and just gave it to nexon then :/

But yeah pr is fine lovin the pbr :)

[GeckoEidechse]

Putting this in the next feature release, consider this essentially merged :P