Adds Android-side configuration and packaging support for Moonshine v2 (merged decoder) models so Kotlin/JNI and Java consumers can use the new model layout and ship additional language variants.
Changes:
- Extend Moonshine offline model config to include a v2 mergedDecoder model path and wire it through JNI.
- Add Moonshine v2 quantized model presets (idx 51–60) for multiple languages in the Kotlin offline model selector.
- Update Moonshine v2 export script + APK model list + GitHub Actions workflow to include new model variants and streamline publishing.
