Update documentation for Makerfaire

[mmroden]

• [x] take photos of assembling m12 box
• [x] take photos of assembling fan box
• [x] take photos of assembling mask
• [x] take photos of mounting on backpack
• [x] create content around photos of m12
• [x] create content around photos of fan box
• [ ] create content around photos of mask
• [ ] create content around backpack mount
• [x] Have a link to docs on tetrab.io
• [ ] readme will direct to https://tetrabiodistributed.github.io/ from https://github.com/tetrabiodistributed/papra-pcba
• [ ] Update tetrab.io (MMR to do this)
• [ ] link to etsy store -- tetrab.io and main documentation site on landing page of tetrabiodistributed.github.io/