Looks awesome. I'm a bit jealous Rails has this resource coming from the Django world (although I know django admin also great but has its limitations)
Look into iommi ( https://docs.iommi.rocks ). It does similar things imo. Disclaimer: I'm one of the authors of iommi.
This looks amazing. I'll definitely be taking it for a spin; looks very full-featured. Might take me a bit to fully grok but looks powerful.
Thank you for developing this! I'll let you know how it goes and try to contribute where I can