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/add--document.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="add--document_1_" d="M31,31.36H7c-0.199,0-0.36-0.161-0.36-0.36v-6.979c-3.464-1.021-6-4.23-6-8.021s2.536-7,6-8.021V1
+	c0-0.199,0.161-0.36,0.36-0.36h18c0.096,0,0.188,0.038,0.255,0.105l6,6C31.322,6.813,31.36,6.904,31.36,7v24
+	C31.36,31.199,31.199,31.36,31,31.36z M7.36,30.64h23.28V7.36H25c-0.199,0-0.36-0.161-0.36-0.36V1.36H7.36v6.441
+	C7.89,7.696,8.439,7.64,9,7.64c4.61,0,8.36,3.75,8.36,8.36c0,4.609-3.75,8.36-8.36,8.36c-0.561,0-1.11-0.056-1.64-0.162
+	C7.36,24.198,7.36,30.64,7.36,30.64z M9,8.36c-4.213,0-7.64,3.427-7.64,7.64S4.787,23.64,9,23.64s7.64-3.427,7.64-7.64
+	S13.213,8.36,9,8.36z M25.36,6.64h4.771L25.36,1.869V6.64z M9.36,20H8.64v-3.64H5v-0.72h3.64V12h0.72v3.64H13v0.72H9.36V20z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>