feat: add dynamic icon support for NavItem components (#5285)

* feat: add dynamic icon support for NavItem components

- Created NavIcon component with switch-case based icon rendering
- Added iconName prop to NavItem and NavItemData interface
- Updated LeftSidePanel to pass icon names to nav items
- Added sample icons to SampleModelSelector navigation (download, tag, layers, grid)
- Uses i-lucide syntax without imports for better tree-shaking

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* test: add Storybook stories for navigation components

- Add NavIcon.stories.ts with interactive icon selector and all icons gallery
- Add NavItem.stories.ts with text customization and interactive list examples
- Add LeftSidePanel.stories.ts with various navigation configurations
- Remove old Navigation.stories.ts (replaced with component-specific stories)
- Configure slot visibility and hide update:modelValue event in controls

* refactor: simplify NavIcon component and improve type definitions

* fix: add icon size specification for Lucide icons in Storybook

* feature: NavItem story modified

* fix: disable knip unresolved imports rule for virtual icon modules

Add unresolved: 'off' to knip configuration to ignore virtual module imports
from unplugin-icons (~icons/*). These are generated at build time and cannot
be resolved statically.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* chore: v-if condition added

* chore: knip ignoreUnresolved added based on knip issue PR

* refactor: navItem types added & deleting any type on storybook files

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/components/widget/nav/NavIcon.vue

@@ -0,0 +1,13 @@
+<template>
+  <span v-if="icon" class="text-xs text-neutral">
+    <component :is="icon" />
+  </span>
+</template>
+
+<script setup lang="ts">
+import { NavItemData } from '@/types/navTypes'
+
+defineProps<{
+  icon: NavItemData['icon']
+}>()
+</script>