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-planning-analytics.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M29.9,16.4l-6,12c-.2.3-.5.6-.9.6h-13c-.6,0-1-.4-1-1s.4-1,1-1h12.4l5.5-11-5.5-11h-12.4c-.6,0-1-.4-1-1s.4-1,1-1h13c.4,0,.7.2.9.6l6,12c.1.3.1.6,0,.9h0v-.1ZM10,22c0,.6.4,1,1,1h11v-2h-11c-.6,0-1,.4-1,1ZM18,15H7c-.6,0-1,.4-1,1s.4,1,1,1h11v-2ZM22,11v-2h-11c-.6,0-1,.4-1,1s.4,1,1,1h11ZM3,15c-.6,0-1,.4-1,1s0,0,0,0h0c0,.6.4,1,1,1s1-.4,1-1,0,0,0,0h0c0-.6-.4-1-1-1ZM6,21c-.6,0-1,.4-1,1s.4,1,1,1,1-.4,1-1-.4-1-1-1ZM6,11c.6,0,1-.4,1-1s-.4-1-1-1-1,.4-1,1,.4,1,1,1Z"/> <rect id="_x3C_Transparent_Rectangle_x3E_" class="cls-1" width="32" height="32"/>
+</svg>