update maintainer tools documentation, new rules for core-for-CI

[Jani Nikula]

On Tue, 25 Oct 2022, Jani Nikula <jani.nikula at intel.com> wrote:
> Patches 1-7 are fairly straightforward documentation updates, with
> completely new documentation for core-for-CI in patch 7.

Pushed these.

> While patch 7 pretty much describes the current model for core-for-CI,
> patch 8 proposes new, stricter rules and development model on top.

I'll polish this a bit more and resend with a wider audience.

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Graphics Center