Standardise inline documentation for errors/events

[djb15]

The inline documentation for newer events/errors is sometimes inconsistent with older ones. Older events had input descriptors with function selectors/topic0 listed, but some newer ones lack either the selector or parameter description, or both. For example, error UnexpectedDeployer(address expectedOwner, address owner); lacks a selector/parameter description. The same issue exists for InvalidPeer, InvalidPeerChainIdZero, and InvalidPeerZeroAddress. It would be great if we could standardize everything.