Refactor settings types to use scripting API

Source/Tools/Flax.Build/Build/Module.cs

@@ -111,5 +111,16 @@ namespace Flax.Build
             // By default deploy all C++ header files
             files.AddRange(Directory.GetFiles(FolderPath, "*.h", SearchOption.AllDirectories));
         }
+
+        /// <summary>
+        /// Adds the file to the build sources if exists.
+        /// </summary>
+        /// <param name="options">The options.</param>
+        /// <param name="path">The source file path.</param>
+        protected void AddSourceFileIfExists(BuildOptions options, string path)
+        {
+            if (File.Exists(path))
+                options.SourceFiles.Add(path);
+        }
     }
 }