[VEN-2840]: add redeemAndRepayBatch to the governance helper

[kkirka]

This PR adds a function to batch-repay multiple debts using either vTokens or underlying.

The way it works is it:

• expects a balance in vTokens, underlying, or both
• computes the total amount to repay
• redeems the maximum possible amount of vTokens, up to balance or total amount to repay
• repays the debts until either all the debts are repaid or the contract is out of underlying
• transfers the excess of vTokens and underlying to the adderess passed as a parameter

The contract is written in a way that it does it best to provide a sane behavior and not revert – this is useful for VIPs since the external factors (exchange rates, borrow balances, etc.) may change, and in most cases we still want the VIP to be executable.

The contract uses a new Currency library inspired by uniswap v4 to support both native assets and tokens in a seamless fashion.

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
contracts	100%	100%	✔
contracts.Admin	88%	41%	✔
contracts.Comptroller	100%	90%	✔
contracts.Comptroller.Diamond	95%	59%	✔
contracts.Comptroller.Diamond.facets	75%	65%	➖
contracts.Comptroller.Diamond.interfaces	100%	100%	✔
contracts.DelegateBorrowers	100%	89%	✔
contracts.Governance	62%	41%	➖
contracts.InterestRateModels	47%	67%	❌
contracts.Lens	45%	37%	❌
contracts.Liquidator	83%	60%	✔
contracts.Oracle	100%	100%	✔
contracts.PegStability	88%	84%	✔
contracts.Swap	88%	58%	✔
contracts.Swap.interfaces	100%	100%	✔
contracts.Swap.lib	81%	55%	✔
contracts.Tokens	100%	100%	✔
contracts.Tokens.Prime	96%	72%	✔
contracts.Tokens.Prime.Interfaces	100%	100%	✔
contracts.Tokens.Prime.libs	90%	76%	✔
contracts.Tokens.VAI	71%	46%	➖
contracts.Tokens.VRT	20%	9%	❌
contracts.Tokens.VTokens	64%	47%	➖
contracts.Tokens.XVS	19%	8%	❌
contracts.Utils	50%	30%	❌
contracts.VAIVault	50%	45%	➖
contracts.VRTVault	49%	36%	❌
contracts.XVSVault	64%	50%	➖
contracts.lib	89%	71%	✔
Summary	69% (3235 / 4701)	49% (1212 / 2458)	➖