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/align-box-top-center.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M26,30H6a2.0023,2.0023,0,0,1-2-2V4A2.0023,2.0023,0,0,1,6,2H26a2.0023,2.0023,0,0,1,2,2V28A2.0023,2.0023,0,0,1,26,30ZM6,4V28H26V4Z"/> <rect x="10" y="7" width="12" height="2" transform="translate(32 16) rotate(-180)"/> <rect x="12" y="12" width="8" height="2" transform="translate(32 26) rotate(-180)"/> </svg>