EquipmentManagerPort

# v0.1.0
- Initial release: Equipment Manager UI ported to Classic Era and TBC Classic / Anniversary,
  built on top of the client's native C_EquipmentSet API.
- Equipment Manager dialog: create, save, rename, re-icon, equip, and delete gear sets.
- Ignored slots, synced with the native C_EquipmentSet ignore-slot API.
- Item flyout per equipped slot (popout arrow): candidate items from bags, equip/unequip,
  ignore/unignore toggle, faithful pixel-level port of Blizzard's flyout background art.
- Hover flyout: hold a configurable modifier key (Shift/Ctrl/Alt, default Alt) over any slot to
  show its item flyout without opening the Equipment Manager dialog.
- Spec assignment (TBC/Anniversary only): right-click a set to link it to a talent spec; switching
  specs auto-equips the linked set.
- Native Settings panel (Esc -> Options -> AddOns) for the hover flyout toggle and modifier key.