Function isValidSurahAyah

isValidSurahAyah(x: [unknown, unknown]): x is SurahAyah
Type guard function that checks if a tuple of two numbers represents a valid Surah and Ayah combination.
Parameters
- x: [unknown, unknown]
  A tuple containing [surahNumber, ayahNumber]
Returns x is SurahAyah
True if the tuple represents a valid Surah-Ayah combination, false otherwise
Example
```
isValidSurahAyah([1, 7]) // true - Al-Fatiha has 7 ayahs
isValidSurahAyah([1, 8]) // false - Al-Fatiha only has 7 ayahs
isValidSurahAyah([115, 1]) // false - there are only 114 surahs
```
- Defined in typeGuards.ts:48