tree 11f03c30b1c0aee6fdb1e5f31c3ba821735302db
parent 556c550a381650eb5b7b2ca5126b4bed281d47f9
author Alan Donovan <adonovan@google.com> 1651597156 -0400
committer Alan Donovan <adonovan@google.com> 1651675872 +0000

README: restructure and update

Update the README file to remove stale information
and describe the most important packages and tools
in the repo, to help users find their bearings amid
the plethora of obscure or obsolete things.

Also, consolidate the Contributing information at the end.

Change-Id: I499c7c62bff142529063df0fc65d9b3da3978379
Reviewed-on: https://go-review.googlesource.com/c/tools/+/403676
Reviewed-by: Robert Findley <rfindley@google.com>