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/file-x.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M18,30h-10c-1.103,0-2-.8975-2-2V4c0-1.103.897-2,2-2h10c.2656,0,.5195.1055.707.293l7,7c.1875.1875.293.4419.293.707v8h-2v-6h-6c-1.103,0-2-.897-2-2v-6h-8v24h10v2ZM18,4.4141v5.5859h5.5859l-5.5859-5.5859ZM28.293,29.707l-3.293-3.293-3.293,3.293-1.4141-1.4141,3.293-3.293-3.293-3.293,1.4141-1.4141,3.293,3.293,3.293-3.293,1.4141,1.4141-3.293,3.293,3.293,3.293-1.4141,1.4141Z"/> </svg>