Reshuffled Nixie page some more to make routing cleaner

Reshuffled nixie schematic to ease with routing. Need to fix the other 3 digits next.

Updated uart names to include peripheral number

Making progress on nixie tube signal routing

50% done routing. Power pour progress!

Routing progress! Maybe 30% done.

Added note about mcu reset

Placement wip

Liking this placement a lot better -- board is looking more symmetric north to south

Placement V1. Want to try and centre the board on the nixies vertically. Saving progress before trying out different placements.