Function getPiperModelsByLanguage

getPiperModelsByLanguage(languageCode: string): Promise<string[]>
Returns catalog model ids filtered by language.

Matching rules:
- exact code match (example: en_US, also accepts en-US)
- family prefix match (example: en matches en_US, en_GB, ...)
Parameters
- languageCode: string
  Exact locale (en_US) or family prefix (en).
Returns Promise<string[]>
Sorted catalog model ids matching the requested language.

Throws
When languageCode is empty.
- Defined in catalog.ts:269