Move my_singleton to utils folder.

[stan220]

Hi, if I wanted to organize the structure in a project, then I made a small change: Move my_singleton to utils folder.
It compiles normally, but Godot can no longer load the extension.

 12:43:21 ~/stan/gdextension $ scons && godot --path project/ --import
scons: Reading SConscript files ...
Auto-detected 12 CPU cores available for build parallelism. Using 11 cores by default. You can override it with the -j argument.
Building for architecture universal on platform macos
scons: done reading SConscript files.
scons: Building targets ...
scons: `godot-cpp/bin/libgodot-cpp.macos.template_debug.universal.a' is up to date.
scons: `project/addons/example/bin/libexample.macos.debug.framework/libexample.macos.debug' is up to date.
scons: done building targets.
ERROR: Can't open dynamic library: /Users/s.aliferovich/stan/gdextension/project/addons/example/bin/libexample.macos.debug.framework. Error: dlopen(/Users/s.aliferovich/stan/gdextension/project/addons/example/bin/libexample.macos.debug.framework/libexample.macos.debug, 0x0002): symbol not found in flat namespace '__ZN11MySingleton13_bind_methodsEv'.
   at: open_dynamic_library (platform/macos/os_macos.mm:236)
ERROR: Can't open GDExtension dynamic library: /Users/s.aliferovich/stan/gdextension/project/addons/example/bin/libexample.macos.debug.framework
   at: open_library (core/extension/gdextension.cpp:802)
ERROR: Failed loading resource: res://addons/example/example.gdextension. Make sure resources have been imported by opening the project in the editor at least once.
   at: _load (core/io/resource_loader.cpp:284)
ERROR: Error loading extension: res://addons/example/example.gdextension
   at: load_extensions (core/extension/gdextension_manager.cpp:234)
Godot Engine v4.3.stable.official.77dcf97d8 - https://godotengine.org
Vulkan 1.2.283 - Forward+ - Using Device #0: Apple - Apple M3 Pro

ERROR: Can't open dynamic library: /Users/s.aliferovich/stan/gdextension/project/addons/example/bin/libexample.macos.debug.framework. Error: dlopen(/Users/s.aliferovich/stan/gdextension/project/addons/example/bin/libexample.macos.debug.framework/libexample.macos.debug, 0x0002): symbol not found in flat namespace '__ZN11MySingleton13_bind_methodsEv'.
   at: open_dynamic_library (platform/macos/os_macos.mm:236)
ERROR: Can't open GDExtension dynamic library: /Users/s.aliferovich/stan/gdextension/project/addons/example/bin/libexample.macos.debug.framework
   at: open_library (core/extension/gdextension.cpp:802)
ERROR: Failed loading resource: res://addons/example/example.gdextension. Make sure resources have been imported by opening the project in the editor at least once.
   at: _load (core/io/resource_loader.cpp:284)
SCRIPT ERROR: Parse Error: Identifier "MySingleton" not declared in the current scope.
          at: GDScript::reload (res://demo/test.gd:8)
ERROR: Failed to load script "res://demo/test.gd" with error "Parse error".
   at: load (modules/gdscript/gdscript.cpp:2936)
ERROR: Cannot get class 'MyNode'.

[stan220]

Oh, I fixed it 😄 . I just add sources+= Glob("src/utils/*.cpp") to SConstruct file.
By the way, @nathanfranke what about to add this example to your repo?