Xain-proto

- HOTFIX add disclaimer (26) [janpetschexain]
- PB-159: remove weights from gRPC messages (25) [Corentin Henry]
- PB-417: start new development cycle (24) [Corentin Henry]

- PB-394 Change metrics type to string (20) [Robert Steiner]
- PB-119 consistify isort (17) [janpetschexain]
- PB-363 Start new development cycle (18) [Anastasiia Tymoshchuk]
- PB-363 :gem: Release v0.4.0. [Daniel Kravetz]

Change protobuf definition to accept flattened arrays instead of lists.

- PB-365 flatten weights (8)
- PB-365 consistify xain-proto naming and change to flattended model weights (7)

Preparing for publishing to PyPI with matching version for `xain-fl` and `xain-sdk`

- XP-333 can not build proto (4)
- XP-480 revise message names (5)
- XP-421 data format ai metrics (3)

The first public release of **xain-proto**

Added

- XAIN FL "coordinator" and "hellonumproto" files