Modularization of network layer

[Xela101]

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• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Enhancement

• What is the current behavior? (You can also link to an open issue here)
  Dotnetty and LibP2P scattered in the Core.Lib libraries.

• What is the new behavior (if this is a feature change)?
  Dotnetty and LibP2P network classes have been separated into their own autofac modules.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

• Other information:

[franssl]

Looks nice, much better with the network modules