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-pictograms/decision-velocity.svg

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 26.0.1, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<path id="decision-velocity_00000088852877804578865550000002934567453703150763_" d="M16.023,31.355
+	c-5.518,0-10.821-2.985-13.56-8.101l-1.124,3.188l-0.679-0.24l1.526-4.329l4.329,1.576l-0.246,0.676l-3.134-1.141
+	c3.657,6.742,12.008,9.564,19.052,6.28c3.703-1.727,6.461-4.917,7.712-8.689c-0.615,0.858-1.409,1.596-2.351,2.162
+	c-1.8,1.082-3.91,1.397-5.949,0.89c-1.768-0.441-3.294-1.456-4.374-2.893l-0.831,3.332l-0.698-0.174l1.114-4.471l4.443,1.156
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+</svg>