type manager for deleting types and hierarchies

[BryonLewis]

Adds a Manage Types dialog from the type list settings (cog -> Manage Types) so users can browse the full type hierarchy including empty and filter-hidden types, rename or reparent types, and delete types with explicit handling for affected tracks.

• New TypeManagementDialog with search, expand/collapse, Direct tracks / Branch tracks counts (all cameras, ignoring visibility and filter state), edit via existing TypeEditor, and delete confirmation with transfer-to-unknown vs delete-entire-track choices.
• New TrackFilterControls.deleteTypeWithTracks and typeTrackIds for unfiltered usage, per-camera label updates on transfer, child promotion on delete, optional Delete empty parents too, and blocking transfer of unknown onto itself.
• Type settings UI: Add Types (import) plus Manage Types entry point; docs updated in UI-Type-List.md.
• Fix: renaming an unused configured flat type keeps the new name in configuredTypes (previously dropped after rename).