Expand triage docs to discuss resolution states
|Reported by:||Owned by:||Jacob|
|Severity:||Keywords:||docs, contributing, triage|
|Cc:||dev@…||Triage Stage:||Ready for checkin|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
It appears that the ticket resolution states is causing a bit of confusion (e.g. see the last few comments on #2724), so we should clarify this in the contributing docs.