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/burger/burger.astro

@@ -0,0 +1,26 @@
+---
+import burger16 from './svgs/burger-16.svg?raw';
+import burger24 from './svgs/burger-24.svg?raw';
+import burger32 from './svgs/burger-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 = burger16;
+else if (size === 24) raw = burger24;
+else if (size === 32) raw = burger32;
+else                  raw = '';
+
+const classes = ['nds-icon-burger', 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/burger/svgs/burger-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="M2 4H14M2 8H14M2 12H14" stroke="#F4F2EF" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/components/Icons/burger/svgs/burger-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="M3 6H21M3 12H21M3 18H21" stroke="#F4F2EF" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/components/Icons/burger/svgs/burger-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="M4 8H28M4 16H28M4 24H28" stroke="#F4F2EF" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>