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/trace.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.0.0, SVG Export Plug-In . SVG Version: 2.1.1 Build 123) --> <path d="M4,27.0001h9.0001v2H4c-1.1,0-2-.9-2-2V3.0001h2v7.9999h9v2H4v6h9v2H4v6.0001ZM10,2.9999v2h20v-2s-20,0-20,0ZM19.0001,13h10.9999v-2h-10.9999v2ZM19.0001,21h10.9999v-2h-10.9999v2ZM19.0001,29.0001h10.9999v-2h-10.9999v2Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>