feat(gatsby): structured logging

[pieh]

This make reporter just dispatch redux actions instead of directly outputting to console.

• Ink will connect to redux state with react-redux
• Yurnalist need some hackiness, but hopefully we will be able to get rid of it (especially after dropping node 6)
• Added barebones json logger (that now just output action objects to stdout):
  

Notes:

• removed our current webpack console updates (we actually have 2 separate packages doing that now :S)
• added initial draft of "stateful messages" - probably will be used mostly for showing/clearing errors:
  

Fixes #17109

[wardpeet]

I left some comments, mostly just questions

[wardpeet]

Thanks for doing all the hard work and listening to all my comments! I'm so excited to get this merged in! 👏 🥇

[sidharthachatterjee]

Published in gatsby@2.16.0 and gatsby-cli@2.8.0