ForeverThreat - Threat Meter for WoW Forever

# ForeverThreat 1.6.1

## Added
- Added full **Spanish localization**.
- Spanish WoW clients (`esES` / `esMX`) now start in Spanish automatically.
- Added live language switching between **Deutsch / English / Español**.
- Added `/ft lang es`.
- Added Spanish addon metadata for `esES` and `esMX`.

## Improvements
- All UI texts, warnings, tooltips, settings, profile texts, debug messages and slash-command help are available in Spanish.
- DE / EN / ES now use the same complete localization set.
- Selected language continues to be saved automatically.

## Compatibility
- Existing threat, raid and performance logic remains unchanged.
- WoW Forever / Camelot compatibility remains unchanged.