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/notification-filled.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M28.707,19.293,26,16.5859V13a10.0136,10.0136,0,0,0-9-9.9492V1H15V3.0508A10.0136,10.0136,0,0,0,6,13v3.5859L3.293,19.293A.9993.9993,0,0,0,3,20v3a1,1,0,0,0,1,1h7v1a5,5,0,0,0,10,0V24h7a1,1,0,0,0,1-1V20A.9993.9993,0,0,0,28.707,19.293ZM19,25a3,3,0,0,1-6,0V24h6Z"/> </svg>