[feature]: A window size hook!

[sirugh]

Is your feature request related to a problem? Please describe.
Components (like Thumbnail) may want to do something when the window size changes such as make a new determination whether to render or not.

Describe the solution you'd like
Implement a window size hook!

Describe alternatives you've considered
We can also implement this as multiple hooks for height and width but that's probably overkill

Additional context
https://codesandbox.io/s/qz590jkzv6

Please let us know what packages this feature is in regards to:

• venia-concept
• pwa-buildpack
• peregrine
• pwa-devdocs
• upward-js
• upward-spec