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/subtract-alt.svg

@@ -0,0 +1,6 @@
+<!-- Generator: Adobe Illustrator 24.0.3, 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="M16,4c6.6,0,12,5.4,12,12s-5.4,12-12,12S4,22.6,4,16S9.4,4,16,4 M16,2C8.3,2,2,8.3,2,16s6.3,14,14,14s14-6.3,14-14 S23.7,2,16,2z"/>
+<rect x="8" y="15" width="16" height="2"/> </svg>