This is the current stand of the manifest implementation.
The goal was to create an implementation that is rather graceful and informative about errors and warning, while also offering manifest versioning for future updates / changes without breakage if desired.
The basic idea to just use ModManifestLoader.load("user://mods/example_mod") and either getting a valid mod manifest
back of the latest version or returning null while printing errors and warnings to the godot log file for helpful information.