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/northern--mockingbird.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 29.1.0, SVG Export Plug-In . SVG Version: 9.03 Build 55587)  -->
+<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="northern--mockingbird_00000141452220381577253380000015459150173037549973_" d="M22.745,24.255L18.85,20.36h-0.981
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+	c0-0.199,0.161-0.36,0.36-0.36h2.811l-2.01-1.341C27.7,10.233,27.64,10.121,27.64,10c0-1.18-0.96-2.14-2.14-2.14
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+	c1.47,0.313,3.013,0.059,4.232-0.704l5.838-3.649C22.752,8.314,23.991,7.14,25.5,7.14c1.511,0,2.752,1.177,2.854,2.663l2.846,1.898
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