Add autorouting via GitHub Workflow

[soundmonster]

• Add first workflow draft
• debug
• Add checkout
• Clear output folder
• Use another node container
• Force npm install
• Try yet another node container
• try pure nodejs action
• Store output
• Add action for DSN export
• Wip action
• Specify paths
• Debug action
• Moar debug
• wip
• wip
• Use thet python script for real
• wip
• wip
• Try to capture xvfb
• wip capture
• wip
• debug kicad config folder
• wip
• strace
• Strace forks too
• Try injecting strace into the scipt that calls pcbnew
• fix broken package file
• ffs
• Move Kicad config to new $HOME
• First try at full autorouting circle
• Add missing actions
• Add Gerbers export
• Try to fix the SES import
• Make paths for kikit absolute
• try recording
• wip
• wip record
• Overwrite the routed PCB
• Turn on gerber export again
• Fix plate file names
• Rename output file
• Update instructions
• Update README