Document and refactor ground-station code

[EliasJRH]

This PR contains some suggested changes that I came up with while documenting the ground-station code. The current notable changes are:

• Move commands.py in the websocket module to websocket_commands.py in the telemetry module. This file only contains logic for parsing incoming commands for the Telemetry process so it seems fitting that the file should exist in the telemetry module
• Rename the queue variable names in telemetry.py to match their name in main.py. This is mainly a nit but it also just clears up some initial confusing
• Split json_packets.py into status.py - which contains the newly named TelemetryStatus class and its associated classes and enums to hold status of telemetry backend - and data.py which contains the TelemetryData and the newly named TelemetryDataPacket classes.
• Remove some functions from utils.py and rename it to parsing_utils.py

On the subject of the last notable change, I was thinking of moving parsing_utils.py into the v1 directory as it's technically built on top of the v1 spec.

[linguini1]

Nit: Call it websocket_commands instead of telemetry_websocket_commands just because its already in the telemetry directory.
Then imports look like telemetry.websocket_commands

[EliasJRH]

Nit: Call it websocket_commands instead of telemetry_websocket_commands just because its already in the telemetry directory. Then imports look like telemetry.websocket_commands

I like this, while we're at it I don't think it'd be a bad idea to do the same for other similarly named files