Format update for new Component Picker

[lorennorman]

We've got a new Component picker design to support!

Big changes to all Components:

• new properties: vendor, description, productURL, documentationURL
• no more animations (already removed the files and validators in this PR)
• images:
  • are now optional as files in the repo
    • if no image file but an Adafruit productURL is present, will be auto-fetched from Shop on import
  • are now validated 4:3 instead of square (matching Adafruit shop product images)
    • old images won't fail validation until they're touched, but will be "squeezed" on the web

Data to add:

• vendor: required, use "generic" as appropriate
• productURL:
  • we should have this on all of our components, at least
  • delete the image file for any components where the first product image on Shop is good (ie not a movie)
• documentationURL: link to a Learn Guide for this component, as appropriate
• description:
  • BRIEF overview of the component, about 100 characters will be visible, up to 255 can be shown on mouse over
  • these can be formulaic, list of sensors and such, no need to get clever (at least not right now)
  • I'm ambivalent about requiring this, may be able to auto-generate something serviceable on my side as a default

/cc @tyeth

[brentru]

@tyeth The vendor field should be who makes the sensor, not the breakout. It can be generic for components like Servo, LED, Button, etc..