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/user-avatar-filled-alt.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M16,8a5,5,0,1,0,5,5A5,5,0,0,0,16,8Z" transform="translate(0 0)"/> <path d="M16,2A14,14,0,1,0,30,16,14.0158,14.0158,0,0,0,16,2Zm7.9925,22.9258A5.0016,5.0016,0,0,0,19,20H13a5.0016,5.0016,0,0,0-4.9925,4.9258,12,12,0,1,1,15.985,0Z" transform="translate(0 0)"/> </svg>