Implemented weapon tint support (desc), closes #477

- Implemented two new xPlayer functions:
  - .getWeaponTint(weaponName)
  - .setWeaponTint(weaponName, weaponTintIndex)

Thanks to @profex1999 for co authoring this!

Co-Authored-By: Andrea Passarini <profex1999@users.noreply.github.com>

locales/de.lua

@@ -189,4 +189,14 @@ Locales['de'] = {
   ['ammo_snowball'] = 'snowball(s)',
   ['ammo_flare'] = 'flare(s)',
   ['ammo_flaregun'] = 'flare(s)',
+
+  -- Weapon Tints
+  ['tint_default'] = 'default skin',
+  ['tint_green'] = 'green skin',
+  ['tint_gold'] = 'gold skin',
+  ['tint_pink'] = 'pink skin',
+  ['tint_army'] = 'army skin',
+  ['tint_lspd'] = 'blue skin',
+  ['tint_orange'] = 'orange skin',
+  ['tint_platinum'] = 'platinum skin',
 }