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/ibm--elm-publishing.svg

@@ -0,0 +1,11 @@
+<?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="ibm--elm-publishing_00000075138028716558985100000016393064265996893568_" d="M17,31.36H2c-0.199,0-0.36-0.161-0.36-0.36
+	V1c0-0.199,0.161-0.36,0.36-0.36h18c0.096,0,0.188,0.038,0.255,0.105l6,6C26.322,6.813,26.36,6.904,26.36,7v11h-0.72V7.36H20
+	c-0.199,0-0.36-0.161-0.36-0.36V1.36H2.36v29.28H17V31.36z M20.36,6.64h4.771L20.36,1.869V6.64z M17,21.36H6v-0.72h11V21.36z
+	 M22,15.36H6v-0.72h16V15.36z M30.509,26l-4.254-4.255l-0.51,0.51l3.386,3.385H19v0.721h10.131l-3.386,3.385l0.51,0.51L30.509,26z"
+	/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>