Add stable Sushi LP PYD-USDC from

New Polyquity stable farm averaging just under ~200% APY, will run for 50 days (https://app.polyquity.org/farms)

Koge supported PUSD-USDC sLP (the precursor to PYD). PUSD can be swapped 1:1 with PYD (https://app.polyquity.org/mint-pyd)

We've stayed updated on Sushi LPs, so would love to see this continue