Refactor Dispatch

The router behind /refactor. One job: pick the mode, resolve scope, delegate. It holds no refactoring logic of its own — each engine below owns its rubric. Some modes edit code, some only report; the mode table says which.

Contract

Inputs:

• A mode argument (deslop / code / debt / perf / structure / stack), an optional scope flag (--changed for branch-only, all for whole monorepo), and a target (file, dir, or PR) forwarded to the engine.

Outputs:

• The delegated engine's output: applied edits (deslop / code / stack), a prioritized report (debt / perf), or a read-only finding list (structure).