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/private-network.svg

@@ -0,0 +1,2 @@
+<svg id="Icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.0.0, SVG Export Plug-In . SVG Version: 2.1.1 Build 123) --> <path d="M23,23v3h-14.5c-2.5,0-4.5-2-4.5-4.5s2-4.5,4.5-4.5h.5v-2h-.5c-3.6,0-6.5,2.9-6.5,6.5s2.9,6.5,6.5,6.5h14.5v3h8v-8h-8ZM29,29h-4v-4h4v4ZM23.5,4h-14.5V1H1v8h8v-3h14.5c2.5,0,4.5,2,4.5,4.5s-2,4.5-4.5,4.5h-.5v2h.5c3.6,0,6.5-2.9,6.5-6.5s-2.9-6.5-6.5-6.5ZM7,7H3V3h4v4ZM20,15h-1v-2c0-1.7-1.3-3-3-3s-3,1.3-3,3v2h-1c-.6,0-1,.4-1,1v5c0,.6.4,1,1,1h8c.6,0,1-.4,1-1v-5c0-.6-.4-1-1-1ZM15,13c0-.6.4-1,1-1s1,.4,1,1v2h-2v-2ZM19,20h-6v-3h6v3Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>