Ensure resource providers are correctly initialized.

PiperOrigin-RevId: 854095105
Change-Id: I028265d7f51e6ab178f4f3a1d801ba773093214f

src/experimental/studio/main.cc

@@ -75,6 +75,8 @@ int main(int argc, char** argv, char** envp) {
   const std::string ini_path = std::string(home ? home : ".") + "/.mujoco.ini";
 
   mjpResourceProvider resource_provider;
+  mjp_defaultResourceProvider(&resource_provider);
+
   resource_provider.open = [](mjResource* resource) {
     const std::string resolved_path = Resolve(resource->name);
     FileResource* f = new FileResource(resolved_path);

src/experimental/studio/wasm.cc

@@ -72,6 +72,8 @@ void Init() {
   const std::string ini_path = "";
 
   mjpResourceProvider resource_provider;
+  mjp_defaultResourceProvider(&resource_provider);
+
   resource_provider.open = [](mjResource* resource) {
     AssetRegistry& r = AssetRegistry::Instance();
     return static_cast<int>(r.Get(resource->name).size());