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/download--01.svg

@@ -0,0 +1,13 @@
+<?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="download--01">
+	<g id="download_2_">
+		<path d="M31,31.36H1c-0.199,0-0.36-0.161-0.36-0.36v-8h0.72v7.64h29.28V23h0.721v8C31.36,31.199,31.199,31.36,31,31.36z"/>
+		<polygon points="16,23.509 9.746,17.255 10.254,16.746 15.64,22.131 15.64,1 16.36,1 16.36,22.131 21.745,16.746 22.255,17.255 		
+			"/>
+	</g>
+</g>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>