Add strETH asset adaptor #48
Description
Add a new asset adaptor which is able to value the worth of vault shares using the strETH strategy vault.
- https://docs.mellow.finance/strategy-vault/overview
- https://github.com/mellow-finance/flexible-vaults/blob/cf130329774b50a24f1a6eddbb44826b79fcd467/scripts/ethereum/strETH.s.sol
- https://github.com/mellow-finance/flexible-vaults/blob/cf130329774b50a24f1a6eddbb44826b79fcd467/scripts/ethereum/strETHLibrary.sol