Add a project for serialization based on Protobuf

[masesdevelopers]

Is your feature request related to a problem? Please describe.
KEFCore.SerDes package is the base reference for serialization; another serialization mechanism shall be based on Protobuf to extend capabilities of the projects.

Describe the solution you'd like
Use the project in KNet as reference and create a new package in KEFCore following the Avro project.

Describe alternatives you've considered
N/A

Additional context
See #90