feat: Enhance and add examples

[gabbopalma]

Closes #712

[Copilot]

Pull request overview

This pull request enhances the MapLibre GL example application by adding four new interactive examples demonstrating draggable and animated features for both annotations and style layers. The PR also includes several improvements to existing examples and updates resource URLs to use the official MapLibre demo tiles server.

Changes:

• Added four new example pages: draggable/animated annotations and draggable/animated style layers
• Updated glyphs URLs from orangemug.github.io to demotiles.maplibre.org for better reliability
• Refactored symbol overlap settings to reduce redundant API calls and added diagnostic logging
• Improved error logging with stack traces and enhanced type safety in custom marker example

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
maplibre_gl_example/lib/main.dart	Added imports for new examples, WASM detection logging, and registered new example pages
maplibre_gl_example/lib/examples/layers/edit_style_layer_draggable.dart	New example demonstrating draggable GeoJSON features on style layers
maplibre_gl_example/lib/examples/layers/edit_style_layer_animated.dart	New example showing animated property updates for style layers
maplibre_gl_example/lib/examples/annotations/edit_annotation_draggable.dart	New example for draggable symbol and circle annotations
maplibre_gl_example/lib/examples/annotations/edit_annotation_animated.dart	New example demonstrating animated annotation updates
maplibre_gl_example/lib/examples/layers/circle_layer_example.dart	Enhanced error logging with stack trace capture
maplibre_gl_example/lib/examples/basics/multi_style_switch.dart	Updated glyphs URL, made _onMapCreated async to apply initial style, removed debug log
maplibre_gl_example/lib/examples/annotations/custom_marker.dart	Improved type safety using toDouble() instead of type cast
maplibre_gl_example/lib/examples/annotations/annotations_example.dart	Refactored overlap settings to _onStyleLoaded, added tap event logging
maplibre_gl_example/assets/style.json	Updated glyphs URL to official MapLibre demo tiles server
maplibre_gl_example/assets/osm_style.json	Added glyphs URL using official MapLibre demo tiles server

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