Add power and key mini-relays

[hcarter333]

Move the relays inside the can! Use a Darlington array to link the Pico-W to the relays.

Pico-W pinout with Darlington inputs

Latching relay usage video (HFD2) https://www.youtube.com/watch?v=QKK3v73P_44

Relay for keyer pinout from below:

data sheet for relay

data sheet for Darlington array

Darlington Array pinout

Typical usage of Darlington Array

Proposed device layout (using superglue)

[hcarter333]

Superglue relay to board

[arhonah]

this is the drawing of how we're going to set this up