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/agile--coaching.svg

@@ -0,0 +1,18 @@
+<?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="agile--coaching_00000100361225582411250770000003545150838675894684_" d="M30.745,30.255L25,24.509l-3.745,3.746
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+	c0.141-0.141,0.368-0.141,0.509,0L12,20.491l3.746-3.746c0.141-0.141,0.368-0.141,0.509,0L24,24.491l0.745-0.746
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+	c-1.18,0-2.14,0.96-2.14,2.14s0.96,2.14,2.14,2.14s2.14-0.96,2.14-2.14S24.68,11.36,23.5,11.36z M8.5,16.36
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+</svg>