Add Support for Custom GeoTIFF Map Layers

[TylerFlar]

Objective

Add the ability for users to load and display their own GeoTIFF files as map layers. This will allow users to overlay custom maps and satellite imagery onto the base map.

Requirements

• GeoTIFF import controls SHOULD be added to the existing map source selector in MapOverlayControls
• GeoTIFF layer management MUST be integrated with the existing map source system
• MUST support common GeoTIFF formats and coordinate systems

Notes

Possible tools to consider:

• georaster-layer-for-leaflet
• geotiff.js for parsing
• proj4js for coordinate transformations (or use pyproj from the backend).

Deliverables

Pull request to dev branch