First import after refactor

[samlown]

• Related to https://github.com/invopop/ticketbai/pull/6

[cavalle]

@samlown I just pushed my latest work on this refactor along with the related changes in https://github.com/invopop/ticketbai/pull/6.

I delimited the scope to completing the extraction of the gobl.ticketbai package, update to use the latest GOBL and make sure everything works. I tested locally and managed to issue invoices successfully in the Batuz test environment.

I suggest that you review these two PRs, provide any feedback you may have, we decide whether we should address it in these PRs or in subsequent ones, we merge and I continue with the other things we've identified (e.g. move from item keys extensions…)

In summary, this PR doesn't aim to cover everything, just make progress in the right direction (hopefully!)

[samlown]

Looking great @cavalle! And yes, getting the extensions to work with the exception cases would be a great next step. The README.md in that regard is quite out of date.

[cavalle]

Thanks @samlown! I've updated both READMEs, added a basic CLI and setup GH workflows. I'm merging this now.