feat: add style & onEachFeature function for geojson in geolocation controller

[blaggacao]

This no-op function can be overriden / inherited in custom controllers
to craft richer map experiences

Motivation: https://discuss.frappe.io/t/vrp-vehicle-routing-problem-chatgpt-augmented/105143

[blaggacao]

works blissfully in tandem with #21419 :

	setup(frm) {
		df = frm.get_docfield("map");
		df["fieldtype"] = "GeolocationVRP";
		frm.layout.replace_field("map", df);
	},
	refresh(frm) {
		fld = frm.fields_dict["map"];
		fld.refresh(); // not sure why necessary, may be rather a bug in ControlGeolocation
	}

And a custom controller:

frappe.ui.form.ControlGeolocationVRP = class ControlGeolocationVRP extends (
	frappe.ui.form.ControlGeolocation
) {
	point_to_layer(geoJsonPoint, latlng) {
		// Custom rules for how geojson data is rendered on the map
		if (geoJsonPoint.properties.point_type == "circle") {
			return L.circle(latlng, { radius: geoJsonPoint.properties.radius });
		} else if (geoJsonPoint.properties.point_type == "circlemarker") {
			return L.circleMarker(latlng, {
				radius: geoJsonPoint.properties.radius,
			});
		} else {
			// return L.marker(latlng);
			const homeIcon = L.divIcon({ className: "fa fa-home --blue" });
			return L.marker(latlng, { icon: homeIcon });
		}
	}
	setStyle(geoJsonFeature) {
		if (geoJsonFeature.geometry.type === "LineString") {
			return {
				color: geoJsonFeature.properties.stroke,
				weight: geoJsonFeature.properties["stroke-width"],
			};
		}
		return {};
	}
};

[codecov]

Codecov Report

Merging #21322 (c821554) into develop (ae0edd8) will increase coverage by 0.03%.
The diff coverage is 0.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #21322      +/-   ##
===========================================
+ Coverage    63.88%   63.91%   +0.03%     
===========================================
  Files          765      765              
  Lines        69364    69368       +4     
  Branches      6274     6276       +2     
===========================================
+ Hits         44314    44339      +25     
- Misses       21444    21478      +34     
+ Partials      3606     3551      -55     

Flag	Coverage Δ
server-ui	32.31% <ø> (+0.02%)	⬆️
ui-tests	51.68% <0.00%> (+0.08%)	⬆️

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[phot0n]

looks fine to me from a glance. ref: https://leafletjs.com/examples/geojson/