feat: add Combat Mode crosshair improvements

[KodeMannn]

Summary

Adds class-aware hostile range coloring, shortest-range spell overrides, native Combat Mode color customization, and a /cci configuration window.

Behavior

• Hostile aim units use melee, ranged, out-of-range, and override colors.
• Friendly NPC/player, object, mounted, base, and focus states retain Combat Mode reaction behavior.
• Post-reaction hooks prevent Combat Mode refreshes from overwriting hostile range colors.
• Settings are stored in CombatModeDB with defaults merged automatically.

Testing

• /reload and settings persistence
• Hostile hover transitions
• Melee/ranged/out-of-range colors
• Spell override sorting
• Native friendly/object/mounted/focus states
• No Lua errors