Add shelves page to game library; refresh bggpipe export

Port the export's physical shelf layout (.wall/.orow/.ocell) into the
scoped embed.css so /mygames/?g=shelves renders the wall in true
proportions, using the cream board color and accent-purple links for
legibility on the dark theme. Includes a fresh bggpipe re-export (new
Etherfields and Red Dragon Inn titles, updated art). embed.js/embed.css
are untouched by the export.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

static/games/catan-dice-game/index.html

@@ -26,7 +26,7 @@ The game lasts fifteen turns or about 15-30 minutes, after which the player with
 
 Note that the game has been designed for 1-4 players, meaning there is a solitaire version of the game, as well.
 
-Recent versions include double-sided map sheets and instructions for Catan Dice Game Plus.</div>
+Recent versions include double-sided map sheets and instructions for Catan Dice Game Plus.</div><div class="card"><div class="factrow"><b>where it lives</b> Library Kallax · C2</div></div>
 <footer>
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   <p>The Game Shelves · cataloged from shelf photos by