IEP-76 Thin Client Protocol for Ignite 3.0

[Pavel Tupitsyn]

Igniters,

Please review the IEP for thin client protocol in 3.0 [1].
PoC is in progress [2]

[1]
https://cwiki.apache.org/confluence/display/IGNITE/IEP-76+Thin+Client+Protocol+for+Ignite+3.0

[2] https://github.com/apache/ignite-3/pull/191