serializing rules

[slwu89]

Has there been any thoughts regarding serialization of rules? Of course using the simple https://docs.julialang.org/en/v1/stdlib/Serialization/#Serialization.serialize interface works fine, but I was curious if there was a road ahead on serialization of rules besides the methods for arbitrary Julia values. It could come in handy when rules are being stored in an acset, and the entire acset is being serialized via write_json_acset. It's helpful when implementing large, complex rewrite systems that will be reused frequently on many individual Julia processes.