OpenIcon gallery: all 370 icons on /openicon, with search, filters and terminal glyphs (#199)

Replaces the 47-icon sample with the whole reference set: search by name,
alias or keyword; category chips with counts; UI/brand filter; SVG,
Nerd Font, Unicode or ASCII view (the Nerd Font view uses the official
symbols subset to the set's 349 glyphs, 38 KB woff2, MIT); size and
colour; a detail panel with all three glyphs and codepoints, trademark
notes, copy SVG / <img> / icon("key"), and downloads. Ready for the
optional HQ (full-colour) style: a Simple/HQ toggle appears once icons
carry an hq field. Filters live in the URL.

Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/logicsrc-web/public/openicon/set/svg/etsy.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><title>Etsy</title><g transform="translate(2 2) scale(0.83333)"><path d="M8.559 2.445c0-.325.033-.52.59-.52h7.465c1.3 0 2.02 1.11 2.54 3.193l.42 1.666h1.27c.23-4.728.43-6.784.43-6.784s-3.196.36-5.09.36H6.635L1.521.196v1.37l1.725.326c1.21.24 1.5.496 1.6 1.606 0 0 .11 3.27.11 8.64 0 5.385-.09 8.61-.09 8.61 0 .973-.39 1.333-1.59 1.573l-1.722.33V24l5.13-.165h8.55c1.935 0 6.39.165 6.39.165.105-1.17.75-6.48.855-7.064h-1.2l-1.284 2.91c-1.005 2.28-2.476 2.445-4.11 2.445h-4.906c-1.63 0-2.415-.64-2.415-2.05V12.8s3.62 0 4.79.096c.912.064 1.463.325 1.76 1.598l.39 1.695h1.41l-.09-4.278.192-4.305h-1.391l-.45 1.89c-.283 1.244-.48 1.47-1.754 1.6-1.666.17-4.815.14-4.815.14V2.45h-.05z"/></g></svg>