Empty codingkey encode decode output

[Alkenso]

• fix output for case when one of CodingKeys is empty string
• fix mirror decoding of encoded type where one of CodingKeys is empty string

[Alkenso]

@Joannis , please review. Probably you'll find some additional cases that I could miss due to pretty complex conditions of decoding

[Joannis]

I need a bit more time for review, but could you document your intended behaviour here? That helps me review, and end users understand how encoding/decoding enum cases works.

[Alkenso]

Such functionality allows the ability to inline one of codable fields. It works exactly like already documented paragraph Coding key value intrinsic, but this implementation works for complex types, not only simple ones

Also I decided to simplify dealing with Choice containers. Added tests, update README.

[Alkenso]

@Joannis , update with additional fixes

[Alkenso]

@Joannis , ping

[Joannis]

Thanks for the ping! The PR was made at a very unfortunate time, so it got missed

[Joannis]

@Alkenso CI's failing on your changes: https://github.com/CoreOffice/XMLCoder/actions/runs/5207978882/jobs/9425283354?pr=267

[Alkenso]

@Joannis , I dont know how it is possible. Locally all builds fine. Please check on yours

Extension of protocol CodingKey adds method isInlined. Dont think it didnt work on Xcode 13...

[Alkenso]

@Joannis , please re-run CI. Maybe the CI issue could occur because I've made force-push of last commit instead making new one?

[Joannis]

I did re-run it a couple of times, but the CI keeps failing to spin up a worker. I don't know what is going on at Github..

[Joannis]

[Alkenso]

@Joannis , lets revive this PR. Probably we can move to Xcode 14-15 for builds

[Joannis]

@Alkenso Yeah, I think that's a good plan.