Help request: review the native python implementation (python-snap7)

[gijzelaerr]

We've been working hard on a pure python python-snap7, so we can ditch the dll/so requirement, increase the library portability and solve any bugs in the lower level implementation.

Code is here: #569

My problem is that I don't own a PLC and have done all the rewriting using claude and the emulator. I think this rewrite deserves some better testing than this approach :)

[gijzelaerr]

this is now in master