perf: add improvements for traffic sign conversion

Improvements:

1. add default value for traffic sign length.
2. normalize the yaw angle.
3. test adaptation based on the new changes.
4. unit tests added for normalization function.

RoadLogicSuite/Internal/MapConversion/mantle_road_signal_converter.cpp

 /*******************************************************************************
- * Copyright (C) 2024, ANSYS, Inc.
+ * Copyright (C) 2024-2025, ANSYS, Inc.
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -668,7 +668,10 @@ mantle_api::Position3d GetPosition(const road_logic_suite::Signal& signal)
 
 mantle_api::Dimension3 GetDimensions(const road_logic_suite::Signal& signal)
 {
-    return {.length = signal.length, .width = signal.width, .height = signal.height};
+    const auto length_value = signal.length.value();
+    return {.length = (length_value == 0) ? units::length::meter_t(0.1) : signal.length,
+            .width = signal.width,
+            .height = signal.height};
 }
 
 std::vector<mantle_api::Vector3d> CreateBasePolygon(const road_logic_suite::Signal& signal)