Remove architecture/. It was a constant source of merge conflicts, became
an effectively append-only log of the project, and was of dubious value.
Design records live in rfc/, crate details in crate READMEs, and user
documentation in docs/.
Move the git-ignored plans directory from architecture/plans to plans/,
keeping the old .gitignore entry. Remove the arch-doc-writer agents and
update AGENTS.md, CONTRIBUTING.md, skills, the feature request template,
and links in proto/, rfc/, and examples/ that pointed into architecture/.
Signed-off-by: Kris Hicks <khicks@nvidia.com>
Each RFC now lives in its own folder (rfc/NNNN-short-name/) with
README.md as the main proposal. This gives each RFC room for diagrams,
images, and other supporting files without cluttering the top level.
Move 0000-template into the new layout and update rfc/README.md to
describe the convention.
krishicks