Improve custom errors

[zemse]

https://github.com/erc7824/nitrolite/blob/1850dff6589f50c27fd02414c1b797dd3030a2bc/contract/src/Custody.sol#L619

Before:

error InsufficientBalance(uint256 available, uint256 required);

After

error InsufficientBalance(address account, uint256 available, uint256 required);

[zemse]

https://github.com/erc7824/nitrolite/blob/1850dff6589f50c27fd02414c1b797dd3030a2bc/contract/src/Custody.sol#L561

Here the InvalidState is used for multiple checks. When we actually get the error its bit tricky to figure out what caused it.