* WakuNode init without WakuNodeConf
* WakuNode start without WakuNodeConf
* setupNat adjustments for making common version
* Move setupNat to common.nim to be used for v1 and v2
- Remove wakuRelayProto as this is initiated as part of switch PubSub
- Move WakuNode type into waku_types to avoid circular references
- Make necessary adjustments to get tests and sim to work