[AIP-8] round implementation decouple features

[0xKurt]

Abstract

This proposal suggests improvements to the RoundImplementation contract by removing features such as matchAmount, payoutStrategy, token, roundFeePercentage, updateMatchAmount, updateRoundFeePercentage, updateRoundFeeAddress, roundFeeAddress, and setReadyForPayout. The objective is to create a more flexible and unified interface for funding rounds, allowing the creation of rounds without quadratic funding and simplifying project funding without matching requirements. This proposal also recommends integrating the payout strategy into the voting strategy and eliminating the protocol fee, resulting in a more streamlined and adaptable contract.