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/attachment.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>
+<title>attachment</title>
+<path d="M28.1,18.9L13.1,3.9c-2.5-2.6-6.6-2.6-9.2-0.1S1.3,10.5,3.9,13c0,0,0.1,0.1,0.1,0.1L6.8,16l1.4-1.4l-2.9-2.9 C3.6,10,3.6,7.1,5.3,5.4s4.6-1.8,6.3-0.1c0,0,0,0,0.1,0.1l14.9,14.9c1.8,1.7,1.8,4.6,0.1,6.3c-1.7,1.8-4.6,1.8-6.3,0.1 c0,0,0,0-0.1-0.1l-7.4-7.4c-1-1-0.9-2.6,0-3.5c1-0.9,2.5-0.9,3.5,0l4.1,4.1l1.4-1.4c0,0-4.2-4.2-4.2-4.2c-1.8-1.7-4.6-1.6-6.3,0.2 c-1.6,1.7-1.6,4.4,0,6.2l7.5,7.5c2.5,2.6,6.6,2.6,9.2,0.1S30.7,21.5,28.1,18.9C28.1,19,28.1,18.9,28.1,18.9L28.1,18.9z"/> </svg>