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/ibm-watson-studio.svg

@@ -0,0 +1,11 @@
+<!-- Generator: Adobe Illustrator 26.3.1, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
+<svg version="1.1" id="icon" x="0px" y="0px" width="32px" height="32px" 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="M25,21c-2.8,0-5-2.2-5-5s2.2-5,5-5s5,2.2,5,5S27.8,21,25,21z M25,13c-1.7,0-3,1.3-3,3s1.3,3,3,3s3-1.3,3-3S26.7,13,25,13z" />
+<path d="M14,11V6c0-1.1-0.9-2-2-2h-2v2h2v5c0,2.1,1.1,3.9,2.7,5c-1.6,1.1-2.7,2.9-2.7,5v5h-2v2h2c1.1,0,2-0.9,2-2v-5 c0-2.2,1.8-4,4-4v-2C15.8,15,14,13.2,14,11z"/>
+<path d="M2,30v-6h6v6H2z M4,26v2h2v-2H4z"/>
+<path d="M2,19v-6h6v6H2z M4,15v2h2v-2H4z"/>
+<path d="M2,8V2h6v6H2z M4,4v2h2V4H4z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__232_" y="0" class="st0" width="32" height="32"/>
+</svg>