[PIP-15] Cap Treasury and Reward Stakers

PIP Discussion: https://forum.pickle.finance/t/pip-15-cap-treasury-and-reward-stakers/551

Following this RFC, this proposal seeks to cap the Treasury at $500k and sends the rest to Pickle stakers with respect to a specific schedule.

Namely, a 4 week "bonus" disbursement and then a steady-state disbursement thereafter:

• W1: 0.5* of excess + prev wk’s profit fees
• W2: 0.25* of excess + prev wk’s profit fees + excess over cap
• W3: 0.125* of excess + prev wk’s profit fees + excess over cap
• W4: 0.125* of excess + prev wk’s profit fees + excess over cap
• W5+: prev wk’s profit fees + excess over cap

Note: profit fees = 4.5% of jar profits (does not include withdrawal fees)

For illustrative purposes, if we assume a cap excess of $200k, the numbers would look like this:

• W1: $100k + prev wk’s profit fees
• W2: $50k + prev wk’s profit fees + excess over cap
• W3: $25k + prev wk’s profit fees + excess over cap
• W4: $25k + prev wk’s profit fees + excess over cap
• W5+: prev wk’s profit fees + excess over cap