Add uc8253 3.7" mono

[tyeth]

https://www.adafruit.com/product/6395

https://learn.adafruit.com/bare-e-ink-displays-crash-course/3-7-416x240-monochrome-eink-uc8253

[tyeth]

Requires protobuf (adafruit/Wippersnapper_Protobuf#157) and io-rails change (https://github.com/AdafruitInternalDev/io-node/pull/198) to bring in the extra screen support.
Will be the same for the next few screens (two new drivers, think the third may reuse an existing one)

[tyeth]

The runNetFSM and ping both cause a base class response instead of network interface overload, resulting in no network interface and an inability to scan for networks etc.

Similar to what was fixed/experienced in #830 + #829

Adding the linking changes (move WS to be Wippersnapper_WiFi type instead) from #829 solves that.

A publish retry is also added (from #697) so that components are correctly confirmed (display component) as a ping can still sometimes be acknowledged even with a stale client.
The io-node aedes broker does pingresp at a lower level than the keep alive interval timeout and in an already queued response pipeline - we could patch it as testing that locally it did help the firmware to get a proper ping failure earlier, but we rely on the subsequent publish failure instead.

Showing unresolved changes, but they are resolved. Will re-request review after dismissing.