[VT] Wait on response before processing next command

[GwnDaan]

To comply with the standard, we must wait for responses from the VT server before sending the next command. This PR implements that behaviour

[GwnDaan]

The main branch is currently failing to build on PlatformIO: https://github.com/Open-Agriculture/AgIsoStack-plus-plus/actions/runs/7147251833/job/19466433156. This PR will also fix that

[ad3154]

Tested this by re-basing the seeder example on your branch, and... it's a little slow, only around 20 messages per second. Our update rate of the interface means that after a response is received we have to wait a fair bit before sending the next message which causes some noticeable lag. I am wondering if we should explore options to send the next message on-response.

Some ideas:

• Mutex the queue and initiate the transmit of the next message from the receiving thread
• Or, Use a condition variable to wake up the VT worker thread when a message response is received?
• Update faster?

https://github.com/Open-Agriculture/AgIsoStack-plus-plus/assets/10929341/ccdb725d-d1ef-4db6-97b9-8dc1bc78e172

[GwnDaan]

I opted for the mutex because I feel like it's the most efficient one, good that you tested this. I didn't have the environment to notice it

[sonarcloud[bot]]

Quality Gate failed

Failed conditions

64.6% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud