Zarr to iris Cube: add tests and Zarr sample data (v2)

[pp-mo]

Replaces #145
Removed the "pre-commit commit" from valeriupredoi:add_warning_and_tests and re-merged from main instead

Just because #145 diff was polluted with a lot of pre-commit changes.

[pp-mo]

@valeriupredoi many thanks for this
And for all your patience !!

Please let me know if you have other needs.
I'm hoping to get a new stable version out by the end of this month, as @schlunma suggested

[valeriupredoi]

brilliant, many thanks to you, Patrick! Let me know if I can help in any other way - with packaging etc; we'll get back to you with more stuff as we now start using ncdata in anger, so expect me bugging you again in the future 😄 🍻

[pp-mo]

brilliant, many thanks to you, Patrick! Let me know if I can help in any other way - with packaging etc; we'll get back to you with more stuff as we now start using ncdata in anger, so expect me bugging you again in the future 😄 🍻

😨 !

[valeriupredoi]

brilliant, many thanks to you, Patrick! Let me know if I can help in any other way - with packaging etc; we'll get back to you with more stuff as we now start using ncdata in anger, so expect me bugging you again in the future 😄 🍻

😨 !