Implement 'Flight Phase'

[joshua-jerred]

Dependent on #214

Flight Phases:

• Pre-Launch: Starting mode, (no telemetry?)
• Launch: Switch from pre-launch is a manual switch made via a command sent via TCP (Web Client)
• Ascent: The switch from launch to ascent should happen as soon as the flight computer begins to increase in altitude.
• Descent: Dependent on detecting a balloon pop (Separate Issue)
• Recovery: Switch to this mode when the flight computer has landed.

Flight Phase needs to be added to flight_runner_data so that it's immune to hard faults.

The current flight phase also needs to be within shared data

Add the data to the data stream and the server module.