This CL adds the start of an architecture document which can be expanded
as needed. The document is mostly an architecture diagram of how the
various pieces fit together.
Change-Id: I49b6509b9178928d100aece3c284199060969b6c
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28660
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
dan sinclair