Marker Clustering Functionality

[andrewlimaza]

• ENHANCEMENT: Added marker clustering functionality. Groups 2+ markers for Google Maps when zoomed out. Uses default clustering logic.

Examples:

Resolves: #216

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[Copilot]

Pull Request Overview

This PR adds marker clustering functionality to Google Maps integration, allowing multiple markers that are close together to be grouped into clusters at specific zoom levels. The implementation includes the MarkerClusterer library and provides a filter to enable/disable the feature.

Key changes:

• Added MarkerClusterer library (minified JavaScript file)
• Modified marker handling to support clustering via an array
• Added PHP filter pmpromd_map_cluster_markers to control clustering behavior
• Included cluster marker images (m1.png through m5.png)

Reviewed Changes

Copilot reviewed 2 out of 8 changed files in this pull request and generated 3 comments.

File	Description
includes/google-maps/js/marker-cluster.min.js	Added MarkerClusterer library for clustering functionality
includes/google-maps/js/map.js	Modified to store markers in array and conditionally apply clustering
includes/google-maps/includes/functions.php	Added clustering filter, script enqueuing, and dependency management
includes/google-maps/images/m1.png - m5.png	Added cluster marker images for different cluster sizes

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