feat: Add Korean translation (ko)

[pong3147]

What this change does and why
I have added the Korean translation files under the AccessibilityMod/Data/ko/ folder.
This allows users to use the Accessibility Mod with the official Korean version of the game on Steam.

Contributors
This translation was a collaborative effort. I would like to credit the following people who worked on this together:

• Signal Waltz
• Athelas
• pong3147

Testing Steps
I have manually verified the translation by playing the game.

1. Set the game language to Korean (Official Steam version).
2. Copied the ko folder to UserData/AccessibilityMod/.
3. Played Phoenix Wright: Ace Attorney (Game 1) from Episode 1 to Episode 3.
4. Confirmed that the mod successfully loads the Korean strings, menus, and character names during gameplay.

Notes

• Translation Scope: I have not translated the Staff Roll (Credits). It will remain in the fallback language (English).

Thanks!