* resend doesn't take nonce as parameter
* Replace 'delivery failure' with 'receiver failure' in specs
* helper send method
* Fix interface to match not having nonce for resend
* Fix forge tests to not have nonce as a parameter
* fix redeliveryTest
* Split CoreRelayer into CoreRelayer and CoreRelayerDelivery
* fix build error
* forge fmt
* fix interface of getdefaultrelayprovider
* Nice comments for main functions in CoreRelayer.sol
* Nice comments for CoreRelayerMessages
* forge fmt
* merge
* Removes wormholeMessageFee from storage to avoid excessive gas costs.
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Co-authored-by: Sebastián Claudio Nale <sebinale@gmail.com>