add route to convert petrinet/regnet/stocknflow odes to latex

[mwdchang]

To convert models into equations in Terarium, we have been more or less doing the same thing done in sciml-service: parse AMR structure, create an ODESystem, then passing it to latexify. Albeit we only have the toolings for Petrinet.

Since the framework parsers are readily setup here I am thinking we can move shop here, remove duplicated logic, and decommission what we are using currently.

Reference: https://github.com/DARPA-ASKEM/model-service/blob/main/src/ModelService.jl#L88-L99

[jClugstor]

No reason for you to turn AMR in to ODESystem when we already do it, so makes sense to me!