steward verification, current pool, # people supported

[krisbitney]

This PR adds support for:

• steward verification: https://github.com/GoodDollar/GoodCollective/issues/79
• current pool: https://github.com/GoodDollar/GoodCollective/issues/77
• number of people supported: https://github.com/GoodDollar/GoodCollective/issues/75

Todo:

• [ ] - #81

[decentralauren]

steward verification: #79

• Still open. Open items found in the above ticket current pool: #77
• Issue with amount displayed not matching pool amount in contract. Open items found in this ticket:https://github.com/GoodDollar/GoodCollective/issues/45#issuecomment-1917077128