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/unfold-open.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M16,29.9141l-4.707-4.707,1.4141-1.4141,2.293,2.293v-7.0859h2v7.0859l2.293-2.293,1.4141,1.4141-4.707,4.707ZM30,17h-4v-2h4v2ZM24,17h-4v-2h4v2ZM18,17h-4v-2h4v2ZM12,17h-4v-2h4v2ZM6,17H2v-2h4v2ZM17,13h-2v-7.0859l-2.293,2.293-1.4141-1.4141,4.707-4.707,4.707,4.707-1.4141,1.4141-2.293-2.293v7.0859Z"/> </svg>