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/data-center.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M28,10H23V6a2.0023,2.0023,0,0,0-2-2H11A2.0023,2.0023,0,0,0,9,6v4H4a2.0023,2.0023,0,0,0-2,2V28a2.0023,2.0023,0,0,0,2,2H28a2.0023,2.0023,0,0,0,2-2V12A2.0023,2.0023,0,0,0,28,10ZM4,28V12H9v2H7v2H9v2H7v2H9v2H7v2H9v4Zm17,0H11V6H21Zm7,0H23V24h2V22H23V20h2V18H23V16h2V14H23V12h5Z" transform="translate(0 0)"/> <rect x="14" y="8" width="4" height="2"/> <rect x="14" y="12" width="4" height="2"/> <rect x="14" y="16" width="4" height="2"/> </svg>