Absolute count threshold for multi-proposals

[0xarbi]

Related issue https://github.com/DA0-DA0/dao-contracts/issues/368

Approach

• Pull the { quorum: PercentageThreshold } constraint into a MultipleProposalThreshold enum that also allows configuring for a { threshold: Uint128 } constraint
• Update logic in contract.rs to accomodate for these changes when verifying the status of a proposal
• Amend many of the tests to accomodate for this new logic

[blue-note]

wow so fast! nice!

[0xekez]

thanks for this change! looks good at a skim.

we're currently getting really close to releasing v2 of the contracts. thinking we're going to wait on landing this change until that is live. there will be some rebase conflicts here as we're doing some file renaming, but we can return to this / get those fixed once v2 is out!