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/hexagon-outline.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path class="cls-2" d="m23,29h-14c-.3555,0-.6846-.189-.8638-.4961L1.1362,16.5039c-.1816-.3113-.1816-.6965,0-1.0078L8.1362,3.4961c.1792-.3071.5083-.4961.8638-.4961h14c.3555,0,.6846.189.8638.4961l7,12c.1816.3113.1816.6965,0,1.0078l-7,12c-.1792.3071-.5083.4961-.8638.4961Zm-13.4258-2h12.8516l6.4165-11-6.4165-11h-12.8516l-6.4165,11,6.4165,11Z"/> </svg>