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-open-enterprise-languages.svg

@@ -0,0 +1,13 @@
+<!-- Generator: Adobe Illustrator 25.4.1, 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>
+<polygon points="23.586,21.414 27.166,25 27.166,25 23.584,28.587 25,30 30,25 25,20 "/>
+<polygon points="20.414,21.414 16.834,25 16.834,25 20.416,28.587 19,30 14,25 19,20 "/>
+<rect x="22" y="6" width="2" height="8"/>
+<rect x="18" y="6" width="2" height="8"/>
+<path d="M14,14h-2c-1.103,0-2-0.897-2-2V8c0-1.103,0.897-2,2-2h2c1.103,0,2,0.897,2,2v4C16,13.103,15.103,14,14,14z M12,8v4h2V8H12z "/>
+<rect x="6" y="6" width="2" height="8"/>
+<path d="M10,28H4c-1.103,0-2-0.897-2-2V4c0-1.103,0.897-2,2-2h22c1.103,0,2,0.897,2,2v12h-2V4H4v22h6V28z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__589_" class="st0" width="32" height="32"/>
+</svg>