A project crate that path-depends on the engine and lives under the engine
repo (common during authoring) is rejected by cargo unless its Cargo.toml
carries an empty [workspace] table. Surfaced repeatedly by the cycle-0006 and
cycle-0007 fieldtests as a non-obvious onboarding one-liner.
Document it on the consumer-facing surface (project-layout, the "A project
repo" section) so a nested-project author can predict and fix it. The aura new
scaffolder will emit the line once it exists (folds into the CLI work); the
docs capture closes the actionable half now.
closes#9
Brummel
fa2835ebcc