(sigil cli watch)

(sigil cli watch) - Build / test watch loops (post-bootstrap)

Holds the --watch implementations for sigil build and sigil test, factored out of (sigil cli) so the bootstrap CLI does not have to import (sigil json). The full CLI loads this module lazily the first time the user passes --watch.

workspace-build and build-source-paths live in (sigil cli) and are passed in as callbacks to avoid a circular dependency back into the parent.