Implement Action handling

[mempirate]

Context

Implement API Action handling in the main loop:

bolt-registry/src/main.rs

Lines 27 to 41 in 9fde6b0

	while let Some(action) = actions.next().await {
	match action {
	Action::Register { registration, response } => todo!(),
	Action::Deregister { deregistration, response } => todo!(),
	Action::GetRegistrations { response } => todo!(),
	Action::GetValidators { response } => todo!(),
	Action::GetValidatorsByPubkeys { pubkeys, response } => todo!(),
	Action::GetValidatorsByIndices { indices, response } => todo!(),
	Action::GetLookahead { epoch, response } => todo!(),
	Action::GetOperator { signer, response } => todo!(),
	Action::GetValidatorByPubkey { pubkey, response } => todo!(),
	Action::GetOperators { response } => todo!(),
	}
	}
	}

The general pattern is:

Parse the action, get the data (optional), call res = registry.some_action(data), return res on the response channel.