Add support for lucide icons

[kocheick]

Overview

Implements support for Lucide Icons in Kobweb with build-time code generation and
tree-shaking optimization, addressing issue #697.

What’s Changed

New Module: silk-icons-lucide

• Created new frontend module with npm dependency on Lucide icons
• Implemented build-time codegen that extracts SVG data from Lucide’s ESM modules
• Generated strongly-typed composable functions for all 1,600+ Lucide icons
• Added tree-shaking support — only used icons are included in the final bundle

API Design

// Default usage
LiCamera()

// Customized with size and color
LiHeart(size = 2.em, color = Colors.Red)

• Icon functions use the Li prefix (Lucide Icons). Example mappings:
  • camera → LiCamera
  • arrow-down → LiArrowDown
• One composable per icon for optimal tree-shaking.
• No dynamic/generic fallback API in this iteration.

Key Features

• Tree-shakable: Only imported icons are included in the final bundle
• Type-safe: Individual composables for each icon (e.g., LiCamera, LiHeart)
• Customizable: Size, stroke width, color, and standard modifiers
• Performance: Renders as inline SVG elements for optimal performance
• Build-time generation: Icons are generated during build from the npm package

Usage Examples

• Default icon usage: LiCamera()
• Customized icon: LiZoomIn(size = 2.em, color = Colors.Honeydew)

Documentation

• Updated module README with Li* usage examples and API reference
• Clear examples showing default and customized icon usage

Files Added/Modified

• frontend/silk-icons-lucide/build.gradle.kts — Build configuration with codegen
• frontend/silk-icons-lucide/README.md — Usage documentation (updated to Li*)
• playground/site/src/jsMain/kotlin/playground/pages/Widgets.kt — Usage examples (updated to Li*)
• Generated: LucideIcons.kt with all Li* icon composables

Testing

• Icons render correctly in dev and production builds
• Tree-shaking intent: only used icons are included (to be verified)
• SVG structure matches Lucide specifications
• Custom styling (size, color, stroke-width) works as expected

Breaking Changes

None — this is a new optional module.

Related Issues

Closes #697

[bitspittle]

Please check the README.mds I added in silk-icons-fa and silk-icons-mdi. It would be nice if you could add one for this feature as well. It shouldn't be long -- just add some basic information about where you get lucide icons data from, things that might help a future dev navigate this module if they need to make changes.