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/media-library.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="13 15 13 23 13 23 20 19 13 15"/> <path d="M26,28H6a2.0021,2.0021,0,0,1-2-2V12a2.0021,2.0021,0,0,1,2-2H26a2.0021,2.0021,0,0,1,2,2V26A2.0021,2.0021,0,0,1,26,28ZM6,12V26H26V12Z"/> <rect x="6" y="6" width="20" height="2"/> <rect x="8" y="2" width="16" height="2"/> </svg>