Refactor BaseProviderManager for easier 3rd party extendability

[Skunkynator]

Adds the ability for other Plugins to extend BaseProviderManager easily

Example class that is installed in "Location.App" using these methods

public class Example
{
    private BaseProviderManagerProvider(BaseProviderManager manager, FeaturesModule featuresModule)
    {
        // not required if your provider cant contain dot character
        manager.AddDynamicSeperator("example", (string call, out string rest) =>
        {
            rest = "";
            if (!featuresModule.Active)
                return "";

            // Do your stuff

            throw new NotImplementedException();
        });

        manager.AddDynamicProvider("example", key =>
        {
            if (!featuresModule.Active)
                return null;

            // Do your stuff

            throw new NotImplementedException();
        });

        manager.AddModifierHandler((string key, IValues provider, out string rest) =>
        {
            rest = "";
            if (!featuresModule.Active)
                return null;

            // Do your stuff

            return null;
        });
    }
}

Im up to change the implementation if any concerns arise.