Prepare 2.13.0 release

[joshmoore]

TODO:

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/tutorial.rst
• Changes documented in docs/release.rst
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[codecov]

Codecov Report

Merging #1133 (1e3d9e6) into main (7ae1de7) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1133      +/-   ##
==========================================
- Coverage   99.95%   99.95%   -0.01%     
==========================================
  Files          36       36              
  Lines       14112    14110       -2     
==========================================
- Hits        14105    14103       -2     
  Misses          7        7              

Impacted Files	Coverage Δ
zarr/convenience.py	100.00% <0.00%> (ø)

[julianavmgiusti]

@joshmoore and @MSanKeys963 I believe that to be able to move forward, I would need to create a file .github/release.yml to create the release.yml file in the .github directory. I would like to know if it is the way or am I mistaken?

[GbotemiB]

@julianavmgiusti refer to #1118.