Class generator command with custom paths

What problem does this feature proposal attempt to solve?

When running the artisan lighthouse:mutation command to generate a mutation class which is not within the app/ and App namespace, I receive the error: Maximum function nesting level of '256' reached, aborting!. I'm using nWidart modules and the "Modules/" directory is next to "app/".

Which possible solutions should be considered?

The LighthouseGeneratorCommand should implement a new method:

    /**
     * @return string
     */
    protected function rootNamespace(): string
    {
        return config('lighthouse.namespaces.'.$this->namespaceConfigKey());
    }

This way the generator works without throwing an exception. There is just one more adjustment to make because the generator is writing into the app/ directory directly. So we need to tell the generator to really use this namespace. We can do so by overwriting another method within LighthouseGeneratorCommand: protected function getPath($name). $this->laravel['path'] should only be used if the namespace returned from rootNamespace really starts with "App". Otherwise and absolute path to the namespace should be used.

The problem I figured out right now is that if I change a namespace back to start with "App" I'll receive Maximum function nesting level of '256' reached, aborting! if rootNamespace() is implemented like suggested above. So maybe there needs a few more adjustments to be done.

Inspect LighthouseGeneratorCommand, especially rootNamespace() and getPath($name), along with the lighthouse.namespaces configuration. Reproduce artisan lighthouse:mutation with a namespace outside app/ and with an App namespace, then verify generation uses the configured namespace and path without the nesting-level error.