Create governance resources for website repo

[nate-double-u]

The website repo is missing information about governance, contributing, and maintenance. This can likely be adapted from the cni repo.

Potential additions:

• GOVERNANCE.md
• CONTRIBUTORS.md
• MAINTAINERS.md

[nate-double-u]

/cc @bboreham

[nate-double-u]

While we are looking at this, we should ensure that the maintainers list for this repo is correct