Split out all event cruds into their own files in Delta

[0xTranqui]

tldr moving to a new structure in delta where instead of keeping all event cruds for a contract in one file named {ContraName}.ts, introduce a folder structure where folder = {ContractName}, and one {EventName}.ts is created to house each crud event for that contract. see screenshot for inspo. the contracts we want to do this for are:

• idRegistry
• delegateRegistry (there is no more transfer nonce anymore, just a heads up. plz check solidity before re implementing)
• attestationRegistry
• nodeRegistry
• riverValidatorV1
• LightAccountFactory

[salieflewis]

Resolved #91