Add doc on picozed jumper settings

[npetersen2]

This issue was moved from the AMDC-Firmware repo: Severson-Group/AMDC-Firmware#85

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Originally from @elsevers

Create a dedicated page that explains the picozed jumper settings based on what a developer is trying to accomplish (execute from RAM/update flash/boot from flash), complete with pictures (and/or a diagram).

Background info here: https://seversongroup.slack.com/archives/DBLUEKVSL/p1590076273016500