The Slack community guidelines are kind of wordy and best belong as part
of our code of conduct.
Let's make `README.md` super streamlined, and link out to resources like
this one.
* Add licenses
* More licenses
* Ignore messages.json as they are generated
* More licenses
* Also typescript
* Fix alignment
* Add to svg
* Many more licenses
* more licenses
* Better excludes
* Add licenses to docs and md files
* Pre-finalize licenses
* Fix newlines
* Finalize all sourde licenses
* Fix lint