[Proposal] Implement framework for TRU incentives on new portfolios

Summary

Portfolios receive TRU incentives based upon the portfolio’s total loans outstanding, or “Total Value Outstanding” (“TVO”):

Tier (TVO level)	Base TRU / day
$0-1M	500
$1-5M	2,000
$5-10M	4,000
$10-25M	7,500
$25M+	12,500

This initiative reserves up to 20M TRU to be spent from TRU's unallocated incentives supply.

If approved, this initiative will begin on or after May 16, once live portfolio(s) have been approved to participate in the program.

For full details, please see https://forum.truefi.io/t/idea-framework-for-tru-incentives-on-new-portfolios/982