koKR : Update koKR localization for latest EllesmereUI options

[Crazyyoungs]

What does this PR do?

This PR adds and updates the Korean (koKR) localization for the latest EllesmereUI options, including the new Rebirth tracker settings, Guild/Title nameplate features, Edit Mode warnings, the Druid form-specific bar options, and UI skin details.

How was it tested?

Tested on Live Retail (v12.x) with the koKR client environment.
Verified that all localized strings load properly in-game without any syntax or encoding errors.

Checklist

• [ X ] New settings default OFF (no behavior change without opt-in)
• [ X ] Zero cost while disabled: no events registered, no polling, no hooks doing work, no frames built
• [ X ] Cheap while enabled: event-driven (no polling, no timer-based logic, no per-frame allocations)
• [ X ] No writes onto Blizzard-owned frames (weak-table pattern used); HookScript/hooksecurefunc only, never SetScript on Blizzard frames
• [ X ] Tested in-game, works on live retail; no load errors on the 12.1 PTR client