Add API reference for V3 Implementation in the docs

[MSanKeys963]

Hi all. I've added the API reference for V3 implementation in the docs. This issue was raised in the community meeting on 2/8 this week.

Linking this from #1337. Preview available here: https://zarr--1345.org.readthedocs.build/en/1345/api/v3.html

Let me know what you think. Suggestions welcome.

CC: @joshmoore @grlee77 @jstriebel

TODO:

• Changes documented in docs/release.rst
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[joshmoore]

Thanks, @MSanKeys963! I imagine @ivirshup will want to take a look. I'll add here that @jstriebel was skeptical about getting this released with ZEP1 still in-flight, but this PR will at least give us a place to start prepping the docs.

[codecov]

Codecov Report

Merging #1345 (b17b17a) into main (280d969) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main     #1345   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           36        36           
  Lines        14748     14803   +55     
=========================================
+ Hits         14748     14803   +55     

see 8 files with indirect coverage changes

[joshmoore]

Shall I roll this into 2.15?

[MSanKeys963]

Shall I roll this into 2.15?

We're good. @jstriebel, please let me know if you want me to add a separate page for sharding or if you'd like to do it. Thanks!

[joshmoore]

Hearing from @MSanKeys963 that @jstriebel is happy with this, I'm going to get it merged. Thanks all!