Simplify Layout

Make file trees short-named and well-grouped: folder context carries the noun; leaf files stay short verbs/aspects; related code sits together.

Canonical shape: references/layout-model.md.

Scope

1. User-provided path first (package, feature, or subtree).
2. Current git changes if no path is given and the diff is layout-shaped.
3. Ask once if the boundary is ambiguous.

Default to propose (read-only rename/group map). Only rewrite paths when the user says apply / migrate / implement.

First Steps