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/subsetting.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M24.8682,16.5039L16.8682,2.5039c-.356-.623-1.3804-.623-1.7363,0l-8,14c-.177.3096-.1758.6895.0032.998.179.3081.5085.498.865.498h7v12h2v-12h7c.3564,0,.686-.1899.865-.498.179-.3086.1802-.6885.0032-.998ZM9.7231,16l6.2769-10.9844,6.2769,10.9844h-12.5537Z"/> </svg>