* Refactor mempool naming and added settings to backend trait
* Implement mempool networking traits and waku backend
* Transaction networking plumbing in mempool service
* Make TransactionMsg generic
Use bincode to deserialize tx messages
* Make wakuadapter generic over tx and tx-id
* Fix wrong backend type bound
* Adapt to waku beta2
* Thread tx and id together for adapter and pool
* Panic on subscribing error
* Prune unnecessary Id type bounds
* Remove transaction placeholder
* Remove Id bound from waku adapter
* Remove empty transactions module
