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/headphones.svg

@@ -0,0 +1,12 @@
+<?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">
+<path id="headphones_1_" d="M27,31.36c-1.302,0-2.36-1.059-2.36-2.36v-8c0-1.302,1.059-2.36,2.36-2.36s2.36,1.059,2.36,2.36v8
+	C29.36,30.302,28.302,31.36,27,31.36z M27,19.36c-0.904,0-1.64,0.735-1.64,1.64v8c0,0.904,0.735,1.64,1.64,1.64
+	s1.64-0.735,1.64-1.64v-8C28.64,20.096,27.904,19.36,27,19.36z M5,31.36c-1.301,0-2.36-1.059-2.36-2.36v-8
+	c0-1.302,1.059-2.36,2.36-2.36S7.36,19.698,7.36,21v8C7.36,30.302,6.301,31.36,5,31.36z M5,19.36c-0.904,0-1.64,0.735-1.64,1.64v8
+	c0,0.904,0.736,1.64,1.64,1.64S6.64,29.904,6.64,29v-8C6.64,20.096,5.904,19.36,5,19.36z M31.36,25h-0.72v-9
+	c0-8.073-6.567-14.64-14.64-14.64C7.927,1.36,1.36,7.927,1.36,16v9H0.64v-9C0.64,7.53,7.53,0.64,16,0.64S31.36,7.53,31.36,16V25z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>