Revamp sleep system

[NathanJesudason]

Describe the feature you'd like Change from hardware system to pure software. Really only needed once the new board is done, but can be worked on independently.

[NathanJesudason]

Look into how the software sleep works and what stays active while on sleep/low-power (interrupts hopefully)

People in the lab will likely be a helpful resource

[NathanJesudason]

I will reach out to lab people about low-power mode

[NathanJesudason]

software sleep mode needs pinmodes and sensors reinitialized when waking up. Will on the Loom team is always a resource