Document the PR Wrangler Shadow Program for SIG Docs

[natalisucks]

This is a Feature Request

Our PR Wrangler workflow has been a great way to meet our commitment in keeping PR numbers at a manageable amount. We've recently introduced a way for new contributors to understand the PR Wrangling process, as a way to onboard possible new reviewers, approvers, and wranglers.

What would you like to be added

The above-mentioned shadowing process was brought up and discussed in a late 2021 SIG Docs meeting, however, has no documentation to explain the process or the expectations of the PR Wrangler and their shadow. We should put together information, added to our existing PR Wranglers documentation, that lists details about this program, how to become a shadow, and what participants can expect to learn.

Why is this needed

To ensure our shadow process is successful, a clearly documented guide is needed so we can better recruit for this program and evangelize it. Given we'll be reporting on this addition to our training in the 2021 Kubernetes Annual Report, we should prioritize the creation of these docs.

cc: @divya-mohan0209 @reylejano @bradtopol @a-mccarthy @jimangel @sftim

[sftim]

/language en
/sig docs
/triage accepted

[Babapool]

Hi, I would like to work on this issue. Thanks.
/assign