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/model-alt.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M28.4473,16.1055,23,13.3818V7a1,1,0,0,0-.5527-.8945l-6-3a1.0008,1.0008,0,0,0-.8946,0l-6,3A1,1,0,0,0,9,7v6.3818L3.5527,16.1055A1,1,0,0,0,3,17v7a1,1,0,0,0,.5527.8945l6,3a1.001,1.001,0,0,0,.8946,0L16,25.1182l5.5527,2.7763a1.001,1.001,0,0,0,.8946,0l6-3A1,1,0,0,0,29,24V17A1,1,0,0,0,28.4473,16.1055ZM21,13.3818l-4,2V10.6182l4-2ZM16,5.1182,19.7637,7,16,8.8818,12.2363,7Zm-5,3.5,4,2v4.7636l-4-2ZM9,25.3818l-4-2V18.6182l4,2Zm1-6.5L6.2363,17,10,15.1182,13.7637,17Zm1,1.7364,4-2v4.7636l-4,2Zm10,4.7636-4-2V18.6182l4,2Zm1-6.5L18.2363,17,22,15.1182,25.7637,17Zm5,4.5-4,2V20.6182l4-2Z"/> </svg>