Changed GetRos2ForUnityPath() to allow dynamic directory

Author: Robert Roos

src/Ros2ForUnity/Scripts/ROS2ForUnity.cs

@@ -86,12 +86,24 @@ private string GetEnvPathVariableValue()
     public static string GetRos2ForUnityPath()
     {
         char separator = Path.DirectorySeparatorChar;
-        string appDataPath = Application.dataPath;
-        string pluginPath = appDataPath;
+        string pluginPath = "";
 
-        if (InEditor()) {
-            pluginPath += separator + ros2ForUnityAssetFolderName;
+        var assets = AssetDatabase.FindAssets($"t:Script {nameof(ROS2ForUnity)}");
+        if (assets.Length == 1)
+        {
+            var assetPath = AssetDatabase.GUIDToAssetPath(assets[0]);
+            pluginPath = Path.GetDirectoryName(Path.GetDirectoryName(assetPath));
+            // We found "Ros2ForUnity/Scripts/[file].cs", go up two levels
+        }
+        else
+        {
+            pluginPath = Application.dataPath;
+            if (InEditor())
+            {
+                pluginPath += separator + ros2ForUnityAssetFolderName;
+            }
         }
+
         return pluginPath; 
     }