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-dcc.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-dcc_00000008127248929887102470000008454898567523058358_" d="M27,31.36H5c-0.199,0-0.36-0.161-0.36-0.36V1
+	c0-0.199,0.161-0.36,0.36-0.36h22c0.199,0,0.36,0.161,0.36,0.36v30C27.36,31.199,27.199,31.36,27,31.36z M5.36,30.64h21.28v-9.28
+	H5.36V30.64z M5.36,20.64h21.28v-9.28H5.36V20.64z M5.36,10.64h21.28V1.36H5.36V10.64z M11,6c0,0.552-0.448,1-1,1S9,6.552,9,6
+	s0.448-1,1-1S11,5.448,11,6z M10,15c-0.552,0-1,0.448-1,1s0.448,1,1,1s1-0.448,1-1S10.552,15,10,15z M10,25c-0.552,0-1,0.448-1,1
+	s0.448,1,1,1s1-0.448,1-1S10.552,25,10,25z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>