badges link to sections

[jlurgo]

• capabilities badges are now links to /capability/device_id
• refactored capabilities into models
• cleanup
• extra: moves heartbeat status to the first column

closes #28 closes #27

[chfritz]

I'm getting this error now when opening the devices page:

devices-section.tsx:137 Uncaught TypeError: Cannot read properties of undefined (reading 'route')
    at devices-section.tsx:137:39

Unfortunately that line (137) doesn't exist in the devices-section.tsx file -- one of the annoying things with typescript, it's referring to the compiled code, not the source. I believe there is a way to configure typescript so that it produces usable source maps that link back to the source, but haven't yet figured out how.