Refactor CoreInterop and update dependent files

The heavy refactoring of the CoreInterop codebase involved the removal of `CoreNative.cs` and `CoreNative.g.cs` file. This was compensated by adding the required logic in `ScenariumCore.cs`, including DLL imports. Additional changes were implemented to `ScenariumCore` to facilitate communication with its DLL. Commit also includes changes to `prebuild.bat`, updating the path to the DLL, and rewriting several functions in Rust code (in `graph_api.rs` and `func_lib_api.rs`). Notably, Graph and FuncLib now export to YAML. Additionally, removed redundant `ScenariumCore.Init()` calls in `Program.cs` and `MainWindow.xaml.cs`.

ScenariumEditor.NET/ConsolePlayground/Program.cs

@@ -1,11 +1,7 @@
-using System.Diagnostics;
-using CoreInterop;
+using CoreInterop;
 
 
-ScenariumCore.Init();
+var scenarium = new ScenariumCore();
+var buf = scenarium.GetGraph();
 
-for (int i = 0; i < 3; i++) {
-    var scenarium = new ScenariumCore();
-    // scenarium.GetNodes();
-    scenarium.GetFuncs();
-}
+Console.WriteLine(buf);