An object containing metadata about the Ruku including:
- rukuNum: The Ruku number
- firstAyahId: The global Ayah ID of the first verse in this Ruku
- lastAyahId: The global Ayah ID of the last verse in this Ruku
- first: The Surah and Ayah numbers for the first verse
- last: The Surah and Ayah numbers for the last verse
Retrieves metadata for a specific Ruku (section) of the Quran.