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/sprout.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>sprout</title><path d="M25,2A11.01,11.01,0,0,0,14.7549,9.0244,6.9939,6.9939,0,0,0,9,6H6V9a7.0078,7.0078,0,0,0,7,7h1v9.0493a9.9229,9.9229,0,0,0-6.071,2.8794l1.414,1.4141a8,8,0,0,1,12.3086,1.2134l1.6616-1.1128A9.98,9.98,0,0,0,16,25.062V16h1A11.0125,11.0125,0,0,0,28,5V2ZM13,14A5.0057,5.0057,0,0,1,8,9V8H9a5.0054,5.0054,0,0,1,5,5v1ZM26,5a9.01,9.01,0,0,1-9,9H16V13a9.01,9.01,0,0,1,9-9h1Z"/></svg>