JSONable interface

[AskewParity]

🚀 Feature

We want to make an interface where we can convert objects into json format. This should be able to at minimum serialize into json and hopefully deserialize. For this task, let the bar be serialization.

Motivation

1. To have a uniform description of objects. This would enable use to manipulate mission memory arbitrarily by just loading in the json.
2. Be able to see the state of obc memory from the GCS (would be helpful to collect this telemetry at test flights)

Alternatives

Doesn't necessarily have to be json (json is just what came to mind first)