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/enable-step.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.2.1, SVG Export Plug-In . SVG Version: 2.1.1 Build 1) --> <path d="M29,12H3c-.6,0-1-.4-1-1V3c0-.6.4-1,1-1h26c.6,0,1,.4,1,1v8c0,.6-.4,1-1,1ZM4,4v6h24v-6H4ZM23,27.2l-2.6-2.6-1.4,1.4,4,4,7-7-1.4-1.4-5.6,5.6ZM17,22H4v-6h24v3h2v-4c0-.6-.4-1-1-1H3c-.6,0-1,.5-1,1v8c0,.5.4,1,1,1h14v-2Z"/> <rect id="_x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>