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/logo-medium.svg

@@ -0,0 +1,9 @@
+<!-- Generator: Adobe Illustrator 26.3.1, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
+<svg version="1.1" id="icon" x="0px" y="0px" width="32px" height="32px" viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<style type="text/css"> .st0{fill:none;}
+</style>
+<path d="M30,16c0,3.7-0.6,6.7-1.4,6.7c-0.8,0-1.4-3-1.4-6.7s0.6-6.7,1.4-6.7C29.4,9.3,30,12.3,30,16"/>
+<path d="M26.5,16c0,4.1-1.8,7.5-3.9,7.5s-3.9-3.4-3.9-7.5s1.8-7.5,3.9-7.5S26.5,11.9,26.5,16"/>
+<path d="M17.8,16c0,4.4-3.5,8-7.9,8S2,20.4,2,16s3.5-8,7.9-8S17.8,11.6,17.8,16"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__155_" class="st0" width="32" height="32"/>
+</svg>