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/rss.svg

@@ -0,0 +1,9 @@
+<!-- Generator: Adobe Illustrator 22.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
+<svg version="1.1" id="icon" x="0px" y="0px" viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<style type="text/css"> .st0{fill:none;}
+</style>
+<path d="M8,18c-3.3,0-6,2.7-6,6s2.7,6,6,6s6-2.7,6-6C14,20.7,11.3,18,8,18z M8,28c-2.2,0-4-1.8-4-4s1.8-4,4-4s4,1.8,4,4 C12,26.2,10.2,28,8,28z"/>
+<path d="M30,24h-2C28,13,19,4,8,4V2C20.1,2,30,11.9,30,24z"/>
+<path d="M22,24h-2c0-6.6-5.4-12-12-12v-2C15.7,10,22,16.3,22,24z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E_" y="0" class="st0" width="32" height="32"/>
+</svg>