Add NWBZarrIO.read_nwb convenience function

[oruebel]

Motivation

Fix #225

TODO

• [X] Add NWBZarrIO.read_nwb
• [X] Add unit test for reading from S3 via read_nwb
• [X] Add unit test for reading a local file via read_nwb
• [ ] Add documentation for read_nwb to the tutorials

Checklist

• [X] Did you update CHANGELOG.md with your changes?
• [X] Have you checked our Contributing document?
• [X] Have you ensured the PR clearly describes the problem and the solution?
• [X] Is your contribution compliant with our coding style? This can be checked running ruff from the source directory.
• [X] Have you checked to ensure that there aren't other open Pull Requests for the same change?
• [X] Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

Project coverage is 85.64%. Comparing base (797275a) to head (db60493). Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/hdmf_zarr/nwb.py	85.71%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #226 +/- ## ========================================== + Coverage 85.56% 85.64% +0.07% ========================================== Files 5 5 Lines 1185 1198 +13 Branches 292 297 +5 ========================================== + Hits 1014 1026 +12 + Misses 115 113 -2 - Partials 56 59 +3 ```

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[rly]

When you are done with this @oruebel, can you work on https://github.com/hdmf-dev/hdmf-zarr/issues/140 and also maybe copy NWB-related tutorials to PyNWB?

[oruebel]

🆗