* feat(output): add routable Sink for per-scan output capture
introduce a Sink (writer plus an interactive flag) that the package-level
chrome funcs delegate to via DefaultSink, and give ModuleLogger a sink it
writes through. a caller can now hand a scan its own Sink so that scan's
chrome lands on a dedicated writer instead of the process-wide default.
default routing is unchanged: Info/Warn/Module and friends still write to
the same stdout/stderr sink SetSilent configures.
* fix(output): trim redundant sink doc comments
drop comments on thin package-level wrappers that just forward to
the Sink methods, and tighten the Sink methods' own comments to
note the api-mode no-op instead of restating the func name
