Create Hindi-only web output with audio and transliteration

[Copilot]

Hindi-only Quran site was requested under /hindi-web with Hindi UI, audio, Unicode transliteration, and only Hindi translations.

• New generator: Added src/gen_hindi_web.py producing Hindi-only pages (Arabic, audio, Unicode transliteration, Hindi Farooq/Suhail/Mokhtasar/Omari) plus shared Hindi UI text and metadata (Juz, revelation info).
• Build hook: Added make generate-hindi-web target to regenerate /hindi-web.
• Output: Generated /hindi-web HTML for all 114 surahs and index with Hindi UI and corrected Juz mapping.

Example (per-ayah block):

<section class="ayah" id="ayah-1">
  <div class="ayah-header">
    <div class="ayah-num">आयत 1</div>
    <audio controls preload="none" src="https://druvx13-quran-audio-alafasy.hf.space/001001.mp3"></audio>
  </div>
  <div class="line arabic" dir="rtl">بِسمِ اللَّهِ الرَّحمٰنِ الرَّحيمِ</div>
  <div class="line translit"><span class="label">लिप्यंतरण (यूनिकोड):</span>Bismillaahir Rahmaanir Raheem</div>
  <div class="line t-hi"><span class="label">हिंदी (फ़ारूक़ खान):</span>अल्लाह के नाम से जो बड़ा कृपालु...</div>
</section>

https://github.com/user-attachments/assets/25f50891-9e04-4371-9e4b-414b7b766942

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