feat: 添加当前位置Marker，显示实时设计高度，完善地形图代码

android/src/main/java/com/icegps/geotools/ktx/GeoPoint.kt

@@ -0,0 +1,17 @@
+package com.icegps.geotools.ktx
+
+import com.icegps.shared.model.GeodeticCoordinate
+
+/**
+ * @author tabidachinokaze
+ * @date 2025/11/27
+ */
+fun GeodeticCoordinate.niceStr(): String {
+    return "[$longitude, $latitude, $altitude]".format(this)
+}
+
+fun List<GeodeticCoordinate>.niceStr(): String {
+    return joinToString(", ", "[", "]") {
+        it.niceStr()
+    }
+}