Improving discussions in standards groups

Hi all!

I wanted to raise an effort to the PWE's attention, and invite you to
provide feedback if you like; there's no explicit ask here, other than "let
me know if you think this is a bad idea".

In short, we want to improve the tone and engagement in standards venues,
by encouraging more inclusive and productive-conversation-focused behavior
- both by Google employees, and others.  We wanted to highlight this to our
team, and also encourage those outside Google to let us know when we could
do better.  Our intent is to explicitly support Codes of Conduct
(particularly the CEPC), not to replace them.

You can see this work in progress at
https://github.com/cwilso/standards-of-behavior.

To quote the introduction:


We believe the development of successful, open standards for the web
platform requires *safe, inclusive and productive* venues for discussion.
In particular, standards discourse must include and be respectful of
diverse perspectives. At all times, our interactions should be respectful,
professional and constructive.

This document outlines guidelines that we believe are necessary to
encourage constructive conversation, and ensure safety and inclusiveness
for all involved. This is not an attempt to rewrite Codes of Conduct in
venues; we are just indicating that we expect organizations to abide by
their Codes of Conduct, and providing an explicit avenue of support within
our team to those who need it.

Please let me know if you have any feedback; I'm happy to discuss at a PWE
meeting if you like, but will also happily accept feedback in email or
Github issues.

Thanks!

-Chris