Introduce lineDashPattern for LineStyleLayers (#94)

Author: r3to

Sources/MapLibreSwiftDSL/Style Layers/Line.swift

@@ -7,6 +7,7 @@ import MapLibreSwiftMacros
 @MLNStyleProperty<UIColor>("lineColor", supportsInterpolation: true)
 @MLNRawRepresentableStyleProperty<LineCap>("lineCap")
 @MLNRawRepresentableStyleProperty<LineJoin>("lineJoin")
+@MLNStyleProperty<[Float]>("lineDashPattern")
 @MLNStyleProperty<Float>("lineWidth", supportsInterpolation: true)
 public struct LineStyleLayer: SourceBoundVectorStyleLayerDefinition {
     public let identifier: String
@@ -75,7 +76,7 @@ private struct LineStyleLayerInternal: StyleLayer {
         result.lineCap = definition.lineCap
         result.lineWidth = definition.lineWidth
         result.lineJoin = definition.lineJoin
-
+        result.lineDashPattern = definition.lineDashPattern
         result.predicate = definition.predicate
 
         return result

Sources/MapLibreSwiftUI/Examples/Polyline.swift

@@ -30,7 +30,8 @@ struct PolylineMapView: View {
 
             // Add an inner (blue) polyline
             LineStyleLayer(identifier: "polyline-inner", source: polylineSource)
-                .lineCap(.round)
+                .lineDashPattern([2.0, 0.5])
+                .lineCap(.butt)
                 .lineJoin(.round)
                 .lineColor(.systemBlue)
                 .lineWidth(interpolatedBy: .zoomLevel,