wiki: add Carbon Design System icons (2673) + pictograms (1000)

- 2673 SVG icons from @carbon/icons v11.82.0 (~2.5 MB)
- 1000 SVG pictograms from Carbon Design System (~2.0 MB)
- Updated 00-overview.md with asset structure and category listing

All icons: 32x32, fill: currentColor, optimized SVG
All pictograms: 24x24, fill: currentColor, SVG

assets/icons/carbon/calendar.svg

@@ -0,0 +1,6 @@
+<!-- Generator: Adobe Illustrator 24.0.3, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
+<svg version="1.1" id="icon" x="0px" y="0px" width="32px" height="32px" viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<style type="text/css"> .st0{fill:none;}
+</style>
+<title>calendar</title>
+<path d="M26,4h-4V2h-2v2h-8V2h-2v2H6C4.9,4,4,4.9,4,6v20c0,1.1,0.9,2,2,2h20c1.1,0,2-0.9,2-2V6C28,4.9,27.1,4,26,4z M26,26H6V12h20 V26z M26,10H6V6h4v2h2V6h8v2h2V6h4V10z"/> </svg>