feat: site-wide content and feature updates (#2)

A wide-ranging set of updates across multiple pages that accumulated over time.

## Tarot

- Expanded spread descriptions and added "good for" guidance to help users pick the right spread
- Cards now start face-down and flip individually on click, with a synthesised flip sound and text fade-in
- "Click card to reveal" hint shown on each unflipped card
- Spread selection and draw button are locked until all cards in the current reading have been revealed

## Nocturne

- Added dedicated sacred scriptures showcase section
- Added patron saints section with avatar images
- Added Naomi's Prayer
- Added sacred practices section (expanded to six cards)
- Added clergy and hierarchy section
- Added titles of address section
- Added testimonial and expanded FAQ
- Capitalised She/Her pronouns referring to Naomi

## Scripture

- Converted page to interactive book with page-turning
- Expanded canon through the Fourth Edition across multiple updates
- Synced the Ten Commandments with Nocturne
- Fixed meta description to reflect fourteen books
- Capitalised She/Her pronouns referring to Naomi

## Other Pages

- Books, games, and music pages now redirect to `library.nhcarrigan.com`
- Updated user manual with additional context
- Added 404 error page

## Chore / Fixes

- Updated sitemap with new and corrected entries
- Fixed null-safe while loop for filename handling in scripts
- Updated scripts to use correct Windows paths via WSL
- Cleaned up data files and added JSON to `.gitignore`
- Added secret #13

✨ This PR was created with help from Hikari~ 🌸

Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Reviewed-on: #2
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

secrets/index.html

@@ -281,7 +281,7 @@
 
             <div class="secret">
                 <div class="secret-number">Secret #13</div>
-                <div class="unknown">??????</div>
+                <div class="secret-text">Every choice you make leads you somewhere in life. So long as you find happiness, there are no wrong choices.</div>
             </div>
 
             <div class="secret">