Option to share handshakes across peers

Since multiple pwnagotchi's split up the spectrum to scan, would it be possible to have a configurable true/false option for sharing the captured handshakes between them?

I.e. If three are together, in an area, and all have the "enable handshake sharing" set to true, over time, they should all have the same number of captured handshakes.

Option should be 'false' by default in case you don't want to share.

No files, tests, or entry points are named. Start by tracing how captured handshakes are stored and how peers communicate; done means an opt-in configuration setting lets participating peers converge on the same captured-handshake set without enabling sharing by default.

Written by the indexing model from the issue text.