[DIP-003] Add TRYB/USDC Pair

TRYB, the first fiat backed stable coin pegged 1:1 to the Turkish Lira, was developed in April 2019 to ensure financial inclusion for all and to connect everyone with decentralized financial products.

TRYB Website: https://www.bilira.co/

Token Contract: 0x2c537e5624e4af88a7ae4060c022609376c8d0eb

Discussion: https://forum.dfx.finance/t/proposal-to-list-tryb-usdc-pair/45

This proposal [DIP-003], will be the first proposal under the new liquidity mining incentive scheme that was voted on and passed, September 5th, 2021 12:00 PM.

The TRYB is listed at 7pts as of this proposal.

A point system is to be implemented such that each currency can have up to a maximum of 10 points. It scales down linearly based on currency volume but the community can vote to increase/decrease it by up to 2 points per proposal, if the community deems the stablecoin as high/low demand (i.e. PHP, INR, etc.). The source of the volume will be the Bank for International Settlements (BIS) report. https://www.bis.org/statistics/rpfx19_fx.pdf