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/minus-plus.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M24,28h-2v-4h-4v-2h4v-4h2v4h4v2h-4v4ZM6.707,26.707l-1.4141-1.4141L25.293,5.293l1.4141,1.4141L6.707,26.707ZM14,10H4v-2h10v2Z"/> </svg>