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/cloud--download.svg

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 24.1.2, 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">
+<g id="cloud--download">
+	<g id="cloud--download_1_">
+		<path d="M25.189,20.369c3.006,0,5.45-2.448,5.45-5.457c0-2.864-2.228-5.259-5.072-5.454c-0.182-0.013-0.325-0.159-0.335-0.341
+			c-0.197-3.79-3.322-6.758-7.114-6.758c-2.751,0-5.286,1.616-6.456,4.117c-0.081,0.174-0.287,0.253-0.463,0.18
+			c-0.864-0.355-1.774-0.535-2.706-0.535c-3.933,0-7.133,3.2-7.133,7.133c0,3.574,2.648,6.631,6.16,7.109
+			c0.197,0.026,0.335,0.208,0.308,0.405c-0.027,0.196-0.21,0.343-0.406,0.308c-3.867-0.526-6.782-3.89-6.782-7.822
+			c0-4.33,3.523-7.853,7.853-7.853c0.914,0,1.809,0.157,2.666,0.468c1.346-2.581,4.042-4.23,6.959-4.23
+			c4.07,0,7.443,3.107,7.811,7.13c3.07,0.368,5.432,3.007,5.432,6.143c-0.001,3.406-2.769,6.178-6.172,6.178
+			c-0.009,0-0.089-0.004-0.098-0.005c-0.194-0.015-0.372-0.183-0.362-0.378s0.125-0.364,0.338-0.345L25.189,20.369z"/>
+		<polygon points="16,30.509 9.746,24.255 10.254,23.745 15.64,29.131 15.64,13 16.36,13 16.36,29.131 21.745,23.745 22.255,24.255 
+					"/>
+	</g>
+</g>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>