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/cics--explorer.svg

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 28.0.0, 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="cics--explorer_00000036963742964739018840000006316404415007894453_" d="M16,30.36C8.082,30.36,1.64,23.918,1.64,16
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+	L16.36,26.045z M15.64,2.365C8.285,2.556,2.36,8.599,2.36,16c0,7.4,5.925,13.444,13.28,13.636v-3.591l-1.446-5.668l-6.2,3.629
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+	l1.345-5.271l4.649,2.721l-2.721-4.649L24.544,16l-5.271-1.345l2.721-4.649l-4.649,2.721L16,7.457l-1.345,5.271l-4.649-2.721
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+</svg>