improving source builder

Sources/MapLibreSwiftDSL/Data Sources.swift

@@ -46,9 +46,33 @@ public struct ShapeSource: Source {
 
 @resultBuilder
 public enum ShapeDataBuilder {
-    public static func buildBlock(_ components: MLNShape...) -> ShapeData {
-        let features = components.compactMap({ $0 as? MLNShape & MLNFeature })
-
+    // Handle a single MLNShape element
+    public static func buildExpression(_ expression: MLNShape) -> [MLNShape] {
+        return [expression]
+    }
+
+    public static func buildExpression(_ expression: [MLNShape]) -> [MLNShape] {
+        return expression
+    }
+
+    // Combine elements into an array
+    public static func buildBlock(_ components: [MLNShape]...) -> [MLNShape] {
+        return components.flatMap { $0 }
+    }
+
+    // Handle an array of MLNShape (if you want to directly pass arrays)
+    public static func buildArray(_ components: [MLNShape]) -> [MLNShape] {
+        return components
+    }
+
+    // Handle for in of MLNShape
+    public static func buildArray(_ components: [[MLNShape]]) -> [MLNShape] {
+        return components.flatMap { $0 }
+    }
+
+    // Convert the collected MLNShape array to ShapeData
+    public static func buildFinalResult(_ components: [MLNShape]) -> ShapeData {
+        let features = components.compactMap { $0 as? MLNShape & MLNFeature }
         if features.count == components.count {
             return .features(features)
         } else {