feat: add icon set with size variants

Added icons:
- Arrow2Icon
- BinIcon
- BurgerIcon
- CalendarIcon
- CheckIcon
- CloseIcon
- CodeIcon
- CubeIcon
- DownloadIcon
- FilterIcon
- HelpIcon
- HomeIcon
- LinkIcon
- MinusIcon
- MoreIcon
- OverviewIcon
- PlusIcon
- ProfileIcon
- SearchIcon
- SettingsIcon
- ShareIcon
- ShieldIcon
- SortIcon
- StatsIcon
- UploadIcon

Available sizes:
- 16px
- 24px
- 32px

SortIcon variants:
- default
- ascend
- descend

Notes:
- Added a dedicated icon grid preview in the design system page
- Verified consistency across all supported sizes

src/components/Icons/overview/overview.astro

@@ -0,0 +1,26 @@
+---
+import overview16 from './svgs/overview-16.svg?raw';
+import overview24 from './svgs/overview-24.svg?raw';
+import overview32 from './svgs/overview-32.svg?raw';
+
+export interface Props {
+  size:   16 | 24 | 32;
+  label?: string;
+  class?: string;
+}
+
+const { size = 24, label, class: className } = Astro.props;
+
+let raw: string;
+if      (size === 16) raw = overview16;
+else if (size === 24) raw = overview24;
+else if (size === 32) raw = overview32;
+else                  raw = '';
+
+const classes = ['nds-icon-overview', className].filter(Boolean).join(' ');
+const svg = raw
+  .replace(/fill="#[A-Fa-f0-9]{3,8}"/g, 'fill="currentColor"')
+  .replace('<svg ', `<svg class="${classes}" aria-hidden="${label ? 'false' : 'true'}" ${label ? `aria-label="${label}" role="img"` : ''} `);
+---
+
+<Fragment set:html={svg} />

src/components/Icons/overview/svgs/overview-16.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M8.55556 6.33333V3H13V6.33333H8.55556ZM3 8.55556V3H7.44444V8.55556H3ZM8.55556 13V7.44444H13V13H8.55556ZM3 13V9.66667H7.44444V13H3Z" fill="#F4F2EF"/>
+</svg>

src/components/Icons/overview/svgs/overview-24.svg

@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M13 9V3H21V9H13ZM3 13V3H11V13H3ZM13 21V11H21V21H13ZM3 21V15H11V21H3Z" fill="#F4F2EF"/>
+</svg>

src/components/Icons/overview/svgs/overview-32.svg

@@ -0,0 +1,3 @@
+<svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M17.4444 11.8333V3.5H29V11.8333H17.4444ZM3 17.3889V3.5H14.5556V17.3889H3ZM17.4444 28.5V14.6111H29V28.5H17.4444ZM3 28.5V20.1667H14.5556V28.5H3Z" fill="#F4F2EF"/>
+</svg>