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/search-advanced.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="30 6 26 6 26 2 24 2 24 6 20 6 20 8 24 8 24 12 26 12 26 8 30 8 30 6"/> <path d="M24,28.5859l-5.9751-5.9751a9.0234,9.0234,0,1,0-1.4141,1.4141L22.5859,30ZM4,17a7,7,0,1,1,7,7A7.0078,7.0078,0,0,1,4,17Z"/> </svg>