Fix input issue in Unity mod and add Rust client

[mincomk]

Unity Mod Fix

There was issue in Unity mod that manual control from JunoIO code does not work.
When passing an input to the game, OffsetXXX vaiant like craftScript.ActiveCommandPod.Controls.OffsetPitch was needed along with craftScript.ActiveCommandPod.Controls.Pitch. So I added the fix to all inputs.

Rust Client

Additionally, I've added simple Rust-based client of JunoIO, called jio.

[mincomk]

This PR has been superseded by two separate pull requests to keep concerns cleanly split:

• fix: set OffsetPitch/OffsetRoll/OffsetYaw and related Offset fields in JunoIOBridge #2 – fix/unity-input-offset (bug fix only): judenimo/JunoIO#2
  Sets OffsetPitch/OffsetRoll/OffsetYaw and related Offset fields in JunoIOBridge.

• feat: add Rust client library (jio) #3 – feat/rust-client (Rust client only): judenimo/JunoIO#3
  Adds the Rust client library (jio).

Closing this in favour of #2 and #3.