split define_recv_packets! into a separate module

[CramBL]

Builds on top of #47

Part of addressing #19

split define_recv_packets! into a separate module as mentioned in a TODO.

The problem in the previous attempt (as described in the TODO) was related to the proc macros declaring the exact path to certain types like FieldIter and PacketSerializer.

You could "fix" it by adjusting the path to the new place where PacketSerializer now is, but the better choice is to avoid declaring such things in a macro and that's what I did.

Bump MSRV to 1.81.0

That's when "reasons" in allow lints was stabilized. I think it's an important feature for long term maintenance.

Added test.sh script

For convenience to check locally if CI is OK.

I would use just for these things if it was up to me. What do you think about using just?

[andrei-ng]

@CramBL , I will merge this in main after I have a look how you solved the problem. But as per the discussion in the upstream repo, let's team up there.

[andrei-ng]

Bump MSRV to 1.81.0
That's when "reasons" in allow lints was stabilized. I think it's an important feature for long term maintenance.

Added test.sh script
For convenience to check locally if CI is OK.

I would use just for these things if it was up to me. What do you think about using just?

Thank you for the pointers!