fix: ✨ add missing lla function

src/objects/GroundObject.ts

@@ -88,6 +88,18 @@ export class GroundObject extends BaseObject {
     return lla2eci(this.toGeodetic(), gmst);
   }
 
+  /**
+   * Returns the latitude, longitude, and altitude of the GroundObject.
+   * @returns The latitude, longitude, and altitude as an LlaVec3 object.
+   */
+  lla(): LlaVec3<Degrees, Kilometers> {
+    return {
+      lat: this.lat,
+      lon: this.lon,
+      alt: this.alt,
+    };
+  }
+
   /**
    * Converts the latitude, longitude, and altitude of the GroundObject to radians and kilometers.
    * @variation optimized version of this.toGeodetic() without class instantiation for better performance and