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/usage-included-use-case.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path class="cls-2" d="m13,28V5.8281l7.5859,7.5859,1.4141-1.4141L12,2,2,12l1.4143,1.4141,7.5857-7.5854v22.1714c0,1.1045.8955,2,2,2h15v-2h-15Z"/> </svg>