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/ibm-partner-plus.svg

@@ -0,0 +1,2 @@
+<svg id="icons" 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) --> <g> <rect x="12" y="5" width="8" height="2"/> <rect x="12" y="9" width="8" height="2"/> <rect x="5" y="13" width="22" height="2"/> <rect x="5" y="17" width="22" height="2"/> <rect x="12" y="21" width="8" height="2"/> <rect x="12" y="25" width="8" height="2"/> </g> <rect id="_x3C_Transparent_Rectangle_x3E_" class="st0" y="0" width="32" height="32"/>
+</svg>