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/AI-enabled-PDLC.svg

@@ -0,0 +1,2 @@
+<svg id="Icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.1.0, SVG Export Plug-In . SVG Version: 2.1.1 Build 136) --> <path d="M19,18v-7h-1v-2h4v2h-1v7h1v2h-4v-2h1ZM10,9h3l3.5005,11h-2l-.6184-2h-4.7781l-.6018,2h-1.9988l3.4966-11ZM11.3342,10.5889l-1.6284,5.4111h3.5579s-1.6736-5.4135-1.6736-5.4135l-.2559.0024ZM0,0v30h16v-2H2V2h26v22c0,1.1025-.8975,2-2,2h-3.1718s2.5859-2.586,2.5859-2.586l-1.4141-1.414-5,5,5,5,1.4141-1.4142-2.5859-2.5859h3.1718c2.2061,0,4-1.7938,4-3.9999V0H0Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>