implemented gui mode view

build.zig

@@ -71,10 +71,12 @@ pub fn build(b: *std.Build) void {
     });
 
     const raylib = raylib_dep.module("raylib"); // main raylib module
+    const raygui = raylib_dep.module("raygui"); // raygui module
     const raylib_artifact = raylib_dep.artifact("raylib"); // raylib c library
 
     exe.linkLibrary(raylib_artifact);
     exe.root_module.addImport("raylib", raylib);
+    exe.root_module.addImport("raygui", raygui);
 
     // This declares intent for the executable to be installed into the
     // standard location when the user invokes the "install" step (the default