feat: add Attribution file listing third-party icons used in NDS

ATTRIBUTION.md

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+# Attribution
+
+This file lists all third-party icons used within Nova Design System (NDS) that are not proprietary to the project, as referenced in `LICENSE.md` (section 4.1).
+
+All third-party icons used in NDS currently originate from **[Iconify](https://iconify.design/)**, specifically from the **[Lucide](https://lucide.dev/)** icon set (Iconify prefix: `lucide`, license: ISC — no attribution required, commercial use allowed).
+
+Any icon **not listed in this file** is an icon created specifically for NDS and falls under section 4.2 of `LICENSE.md` instead.
+
+## Icon List
+
+| Icon (used in NDS) | Source | Icon Set / Link |
+|---|---|---|
+| `Arrow2Icon` (Chevron) | Iconify | Lucide — [chevron-down](https://icon-sets.iconify.design/lucide/chevron-down/) |
+| `BinIcon` | Iconify | Lucide — [trash-2](https://icon-sets.iconify.design/lucide/trash-2/) |
+| `BurgerIcon` | Iconify | Lucide — [menu](https://icon-sets.iconify.design/lucide/menu/) |
+| `CalendarIcon` | Iconify | Lucide — [calendar](https://icon-sets.iconify.design/lucide/calendar/) |
+| `CheckIcon` | Iconify | Lucide — [check](https://icon-sets.iconify.design/lucide/check/) |
+| `CloseIcon` | Iconify | Lucide — [x](https://icon-sets.iconify.design/lucide/x/) |
+| `CodeIcon` | Iconify | Lucide — [code](https://icon-sets.iconify.design/lucide/code/) |
+| `CubeIcon` | Iconify | Lucide — [box](https://icon-sets.iconify.design/lucide/box/) |
+| `DownloadIcon` | Iconify | Lucide — [download](https://icon-sets.iconify.design/lucide/download/) |
+| `FilterIcon` | Iconify | Lucide — [filter](https://icon-sets.iconify.design/lucide/filter/) |
+| `HelpIcon` | Iconify | Lucide — [circle-help](https://icon-sets.iconify.design/lucide/circle-help/) |
+| `HomeIcon` | Iconify | Lucide — [house](https://icon-sets.iconify.design/lucide/house/) |
+| `LinkIcon` | Iconify | Lucide — [link](https://icon-sets.iconify.design/lucide/link/) |
+| `MinusIcon` | Iconify | Lucide — [minus](https://icon-sets.iconify.design/lucide/minus/) |
+| `MoreIcon` | Iconify | Lucide — [ellipsis](https://icon-sets.iconify.design/lucide/ellipsis/) |
+| `OverviewIcon` | Iconify | Lucide — [layout-dashboard](https://icon-sets.iconify.design/lucide/layout-dashboard/) |
+| `PlusIcon` | Iconify | Lucide — [plus](https://icon-sets.iconify.design/lucide/plus/) |
+| `ProfileIcon` | Iconify | Lucide — [user](https://icon-sets.iconify.design/lucide/user/) |
+| `SearchIcon` | Iconify | Lucide — [search](https://icon-sets.iconify.design/lucide/search/) |
+| `SettingsIcon` | Iconify | Lucide — [settings](https://icon-sets.iconify.design/lucide/settings/) |
+| `ShareIcon` | Iconify | Lucide — [share-2](https://icon-sets.iconify.design/lucide/share-2/) |
+| `ShieldIcon` | Iconify | Lucide — [shield](https://icon-sets.iconify.design/lucide/shield/) |
+| `SortIcon` | Iconify | Lucide — [arrow-up-down](https://icon-sets.iconify.design/lucide/arrow-up-down/) |
+| `StatsIcon` | Iconify | Lucide — [bar-chart-3](https://icon-sets.iconify.design/lucide/bar-chart-3/) |
+| `UploadIcon` | Iconify | Lucide — [upload](https://icon-sets.iconify.design/lucide/upload/) |
+
+## Notes
+
+- The Lucide icon set is released under the ISC license, which permits commercial use without requiring attribution. This file is maintained anyway for transparency and traceability.
+- This file must be kept up to date whenever a new third-party icon is added to NDS.