Switch packages over to using ITensorMPS.jl

[mtfishman]

• ITensorAFQMC.jl - private and unregistered
• ITensorAGP.jl - unregistered (Switch to ITensorMPS.jl ITensorAGP.jl#5)
• ITensorChemistry.jl - unregistered (Start using ITensorMPS.jl ITensorChemistry.jl#12)
• ITensorCorrelators.jl - unregistered (Start using ITensorMPS.jl ITensorCorrelators.jl#3)
• ITensorGaussianMPS.jl (Use ITensorMPS.jl ITensorGaussianMPS.jl#6)
• ITensorGLMakie.jl (ITensorMPS update ITensorGLMakie.jl#6) [Assigned to Miles]
• ITensorGPU.jl (Switch to ITensorMPS.jl ITensorGPU.jl#7)
• ITensorInfiniteMPS.jl (Start using ITensorMPS.jl ITensorInfiniteMPS.jl#83)
• ITensorMakie.jl (no update required) [Assigned to Miles]
• ITensorMPOCompression.jl (started in Start using ITensorMPS.jl JanReimers/ITensorMPOCompression.jl#7)
• ITensorMPOConstruction.jl - unregistered (Start using ITensorMPS.jl ITensorMPOConstruction.jl#15)
• ITensorNetworks.jl (Start using ITensorMPS.jl ITensorNetworks.jl#172)
• ITensorParallel.jl - unregistered (Start using ITensorMPS.jl ITensorParallel.jl#22)
• ITensorQTT.jl - unregistered (Update to use ITensorMPS and compatibility with ITensorTDVP ITensorQTT.jl#11)
• ITensorTDVP.jl (upgrade guide in Add message about switching to ITensorMPS.jl ITensorTDVP.jl#73)
• ITensorUnicodePlots.jl (ITensorMPS update ITensorUnicodePlots.jl#3) [Assigned to Miles]
• ITensorVisualizationBase.jl (ITensorMPS update ITensorVisualizationBase.jl#4) [Assigned to Miles]
• PastaQ.jl (started in Start using ITensorMPS.jl GTorlai/PastaQ.jl#309)

[emstoudenmire]

Best I can tell, no code in ITensorMakie.jl depends on ITensorMPS. So we can mark that one completed.

[mtfishman]

This is nearly complete, ITensorAFQMC.jl is private and not very functional anyway so isn't urgent to update, ITensorMPOCompression.jl has a pending PR, and PastaQ.jl has a pending PR which is hitting some issues that is very likely not directly caused by ITensorMPS.jl.

@emstoudenmire what's the status of ITensorQTT.jl? Can we take a minimal path to upgrading it to using ITensorMPS.jl now that #7 is complete? I think we shouldn't do anything ambitious there, at least not right now for the sake of completing this issue.

[emstoudenmire]

Good reminder. Now that ITensorMPS is updated, ITensorQTT can access all the types and methods it needs again, so tests are passing and I just made an ITensorQTT PR here: ITensor/ITensorQTT.jl#11

The biggest change is that I deleted ITensorQTT.linsolve since it's essentially the same as ITensorTDVP's linsolve (since it has the same signature it was causing a warning, otherwise I might have just left it alone).

[mtfishman]

Ok this is implemented as much as possible right now so I'll close.