Scaffold strict Rust projects

Produce a Rust project whose policy gate passes on the first run, and keep it passing while you extend it. The template renders four profiles: crate (root or workspace, library, binary, or both, host or portable), embedded, wasm, and tauri. Each profile has a fixed layout and a fixed, minimal list of policy exceptions that tools/check.py enforces exactly. Pick the profile from the request, generate, run the gate, and report what ran.

Workflow