Add RTL text plugin support for Arabic/Hebrew languages

[yharby]

Summary

Initialize maplibregl.setRTLTextPlugin() in both JavaScript bundles to enable proper rendering of right-to-left languages (Arabic, Hebrew, etc.).

Changes

Source Files

• src/pymaplibregl.js:
  • Import maplibre-gl module
  • Expose maplibregl globally for compatibility
  • Initialize RTL plugin with lazy loading
• src/ipywidget.js:
  • Initialize RTL plugin with lazy loading

Built Bundles

• py-bindings/pymaplibre.js - Rebuilt with RTL support
• py-bindings/pymaplibre.ipywidget.js - Rebuilt with RTL support

Features

• Lazy loading: Plugin only loads when RTL text is encountered (minimal performance impact)
• Safe initialization: Gracefully handles if plugin is already set
• CDN-based: Uses unpkg.com for the plugin, no bundling needed

Code Added

// Initialize RTL text plugin for Arabic/Hebrew support
try {
  maplibregl.setRTLTextPlugin(
    'https://unpkg.com/@mapbox/mapbox-gl-rtl-text@0.3.0/dist/mapbox-gl-rtl-text.js',
    true  // lazy loading
  );
} catch (e) {
  if (!e.message?.includes('already been set')) {
    console.warn('RTL text plugin:', e.message);
  }
}

Related

• Closes Add RTL (Right-to-Left) text plugin support #4
• Related: Add RTL (Right-to-Left) text plugin support py-maplibregl#157, Add RTL text plugin support and responsive HTML export py-maplibregl#159

Test Plan

• Jupyter notebook - Arabic text renders correctly
• Marimo notebook - Arabic text renders correctly
• Shiny app - Arabic text renders correctly