Improve P2P protocol efficiency and consistency

[shuse2]

Description

Define generic efficient message protocol to be consistent on all of the messages passed through the network using binary format.
Additionally, add missing P2P features to improve the infrastructure.

Motivation

• Update the architecture to prevent incoming messages from affecting the on-chain processing
• Implement missing critical P2P features
• Remove unnecessary dependencies
• Define the communication protocol format

Tasks

• Implement simple ping/pong app and package #6
• Add support for Testground testing platform #7
• Implement functionality for targeting a peer #8
• Implement functionality to disallow incoming connections #9
• Implement ability to reject incoming connection #10
• Add gossipsub with a default config #11
• Implement NAT traversal feature #12
• Define and implement a communication protocol format #13
• Implement functionality for configuring P2P package #14
• Implement ability to hide a peer's role #15
• Implement validator for messages #16
• Check that P2P package is able to mitigate all common attacks #17
• Integrate P2P package into the engine #19
• Implement peerbook or some similar list of peers #31
• Check missing API functionalities for new P2P package #32
• Implement retry policy for a message delivery #33
• Sometimes unit test fails in self-hosted machine #36
• Remove duplicate functions from p2p and define one host for all usage #37
• Implement RegisterRPCHandler in P2P module #41
• Implement new testplan for the latest p2p/v2 module #42
• Refactor to follow the convention of the code in unit tests #44
• Verify peer searching mechanism and seed node handling #47
• Implement peer identity #60
• Add limitation for Peer IDs for each IP #62
• Improve managing connections to peers #63
• Check functions visibility in p2p/v2 #65
• Implement handshake protocol #67
• Move NetworkConfig to P2P package #71
• Add BlockPeer interface to P2P #75
• Add rate limit and penalty on RPC handler on P2P #83
• Remove allowIncomingConnection from p2p config #96
• Conngater should support banning IP address #97
• Remove commit version from the README of the gossipsub #114