Omni's Custom Items 1.1.37 - Radiant Omen Vouchers

Added items:
- pokeisles_foods:radiantomen_voucher_uncommon
- pokeisles_foods:radiantomen_voucher_rare
- pokeisles_foods:radiantomen_voucher_mythic
- pokeisles_foods:radiantomen_voucher_legendary

The four vouchers use the supplied Blockbench item models and textures, have
rarity-colored names, stack to 64, and appear in the Omni's Custom Items tab.

Test commands:
/give @s pokeisles_foods:radiantomen_voucher_uncommon
/give @s pokeisles_foods:radiantomen_voucher_rare
/give @s pokeisles_foods:radiantomen_voucher_mythic
/give @s pokeisles_foods:radiantomen_voucher_legendary
