[flashrom] New doc for review: How to support flashrom

[Anastasia Klimchuk]

Hello everyone!

I am writing to invite everyone who is interested in the subject, to
join the review:
"How to support flashrom" https://review.coreboot.org/c/flashrom/+/80729

The doc is not technical, it's more of organisational. Currently there
is no doc like this, but I think it's needed.

By the nature of the doc, you don't have to be an experienced flashrom
developer to review it. I want the doc to be readable and
understandable to a broader community.

You would need a Gerrit account, and then you can add comments
straight to the patch. As a plan B you can reply in this thread.

Thank you!