Add new exercise: camicia

[FraSanga]

This PR introduces a new exercise where students must simulate the card game Beggar-my-neighbour and implement an algorithm to determine whether a given match eventually ends or falls into an infinite loop.

Here is the topic on the forum.

TO-DO:

• All tests need to be fixed by adding the numbers as requested by Jeremy.
• The example given needs to be fixed (it should not be a json).
• Improve the explanation of card counting and tricks.
• Adding smaller/simpler tests would not be a bad idea.
• Adding Special block (sometimes called admonitions) for edge cases
• Review

[SleeplessByte]

More nits.

Great stuff!

[SleeplessByte]

CI Failure is unrelated:

problem-specifications/exercises/relative-distance/introduction.md

Line 12 in a092893

[islendiga-app]: http://www.islendingaapp.is/information-in-english/

[IsaacG]

CI Failure is unrelated:

problem-specifications/exercises/relative-distance/introduction.md

Line 12 in a092893

[islendiga-app]: http://www.islendingaapp.is/information-in-english/

See #2585

[IsaacG]

@kotp @BNAndras The instructions have changed a fair bit since your approvals. Would you be able to take another look?

[IsaacG]

@ErikSchierboom Would you mind taking a look?

[IsaacG]

FWIW here is my Python implementation which validates the current canonical data.

[ErikSchierboom]

@ErikSchierboom Would you mind taking a look?

Sure!

[ErikSchierboom]

LGTM!

Anyone have any suggestions?

[kotp]

Some potential for mood altering working wording, and clarification about the pile keeps growing. I would think that the pile is always something less than 52 cards.

[IsaacG]

This got a lot of really good feedback from quite a few people. It seems like the feedback has run out. If there's no other feedback in the next 12-24 hours, I'll go ahead and merge.