Conditionally autoloading paid gems in avo

[adrianthedev]

Right now, we autoload all the paid gems' (dashboards, dynamic filters, etc.) paths within the avo gem.

If you want to run a paid Avo repo as open source, those open source maintainers will have a hard time running the app. Rails will crash bc it won't be able to run the dashboard files (for example).

This is a workaround which Marco put together. We could amke it better by having each gem handle it's own autoloading requirements.