feat: avoid error out on frame with invalid manufacturer code

[dragonnn]

I am trying to move my project from pymeterbus and some heatmeters my project has to detect don't have filed out manufacturer code (it contains 0x00 bytes) with leads to m-bus-parser to error out and not be able to parse any DataRecords. I modified the code to not error out and be able to continue.
I suspect storing a Result inside a struct isn't the nicest option but this way the information that something happened while parsing the manufacturer code is still retained. I am open to other ideas how to handle that.

[maebli]

Hey, thanks for the PR! Sorry I only just saw it now. I will take a look :)

I want to understand you issue, you would like to be able to get the parsed result for an illegal manufacturer, am I correct?

Can you provide an example payload maybe?

[dragonnn]

I want to understand you issue, you would like to be able to get the parsed result for an illegal manufacturer, am I correct?

Exactly,
the payload that does this can be found in my other PR https://github.com/maebli/m-bus-parser/pull/29/files#diff-cd9539fdb6e41539f62bd90927ed31026413e7c20f5ecf794429cd1c6a33e5cbR847
when you put that payload into https://dev-lab.github.io/tmbus/tmbus.htm you get this: