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-junior/index.html

@@ -38,7 +38,7 @@ What sets this apart from the previous Die Siedler von Catan: Junior from 2007:
     By default, Trading with other players is excluded and only part of the "advanced game".  In Die Siedler von Catan: Junior trading with other players could be excluded to simplify the game.
 
 
-As in Die Siedler von Catan: Junior you can&#x27;t chain ships; you must build a pirate lair before continuing on.</div>
+As in Die Siedler von Catan: Junior you can&#x27;t chain ships; you must build a pirate lair before continuing on.</div><div class="card"><div class="factrow"><b>where it lives</b> Library Kallax · C2</div></div>
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   <p><a class="pbb" href="https://boardgamegeek.com" rel="noopener"><img src="../art/powered-by-bgg.png" alt="Powered by BGG" height="40"></a></p>
   <p>The Game Shelves · cataloged from shelf photos by