p49-1 jFIAT printer management

Discord: https://discord.com/channels/664096525986824243/951092964719984710/951097233363845170

The Brrr contract allows to mint uncollateralized jFIAT and to deposit them directly in the Treasury (until we develop a contract to deposit them directly into a whitelisted contract).

This first proposal is to set security measures to avoid centralized risks. I propose to:

1. Mint restriction: only the admin of this function can set up the max amount of jFIAT that can be minted. The admin of this function should be the Jarvis Treasury (multi-sig).

2. Recipient address: the admin of this function can set up the address that receives the jFIATs that are being minted. The admin of this function should also be the Jarvis Treasury. The Treasury should not use these jFIATs for anything but depositing liquidity in the Jarvis Forex money market on Market.xyz.

3. Minting power: the admin of this function can decide which address can have the minting power. The admin of this function should be Jarvis LTD (multi-sig), and the address that can mint should also be the one of Jarvis LTD.