AIP - 87: Launch a USD stablecoin

Hello, This is a vote to launch a USD stablecoin with the protocol, leveraging the same technology as what was built for EURA. ### Context Angle has been since its launch focused on the Euro. The technology we have developed on the Euro can work for any type of asset, and so while we had discussions last year to do it on the gold, we suggest to start our expansion with a USD stablecoin: USDA. Idea is that this USD stablecoin should come with a savings solution, stUSD, that earns a portion of...