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/dark-cults/index.html

@@ -22,7 +22,7 @@
 
 It is a story-telling card game, foreshadowing Once Upon a Time: The Storytelling Card Game.  In it, the two players represent Life and Death, respectively, and each tries to guide a horror story to their corresponding outcome.  As well as horror, the creator suggests that the game could be used for a science-fiction or mystery story, although the game's cards may be poorly suited to this.
 
-The second edition was packaged with a magazine called The Cultist.  It proposed solo and four-player variants, and additional &quot;object&quot; cards for the game.</div>
+The second edition was packaged with a magazine called The Cultist.  It proposed solo and four-player variants, and additional &quot;object&quot; cards for the game.</div><div class="card"><div class="factrow"><b>where it lives</b> Library Left Shelving · D1</div></div>
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   <p>The Game Shelves · cataloged from shelf photos by