IEP-78 .NET Thin Client for Ignite 3.0

[Pavel Tupitsyn]

Igniters,

Please review the IEP [1] and the PoC [2] for .NET Thin Client in Ignite
3.0.

[1]
https://cwiki.apache.org/confluence/display/IGNITE/IEP-78+.NET+Thin+Client
[2] https://github.com/apache/ignite-3/pull/306