Release 0.9.0

[mavaylon1]

Prepare for release of HDMF-Zarr [0.9.0]

Before merging:

• [x] Make sure all PRs to be included in this release have been merged to dev.
• [x] Major and minor releases: Update package versions in requirements.txt, requirements-dev.txt, requirements-doc.txt, and requirements-opt.txt to the latest versions, and update dependency ranges in pyproject.toml and minimums in requirements-min.txt as needed. Run pip install pur && pur -r requirements-dev.txt -r requirements.txt -r requirements-opt.txt.
• [x] Check legal file dates and information in Legal.txt, license.txt, README.rst, docs/source/conf.py, and any other locations as needed
• [x] Update pyproject.toml as needed
• [x] Update README.rst as needed
• [x] Update changelog (set release date) in CHANGELOG.md and any other docs as needed
• [x] Run tests locally including gallery tests, and inspect all warnings and outputs (pytest && python test_gallery.py)
• [x] Test docs locally and inspect all warnings and outputs cd docs; make clean && make html
• [x] After pushing this branch to GitHub, manually trigger the "Run all tests" GitHub Actions workflow on this branch by going to https://github.com/hdmf-dev/hdmf-zarr/actions/workflows/run_all_tests.yml, selecting "Run workflow" on the right, selecting this branch, and clicking "Run workflow". Make sure all tests pass.
• [x] Check that the readthedocs build for this PR succeeds (see the PR check)

After merging:

1. Create release by following steps in docs/source/make_a_release.rst or use alias git pypi-release [tag] if set up
2. After the CI bot creates the new release (wait ~10 min), update the release notes on the GitHub releases page with the changelog
3. Check that the readthedocs "latest" build runs and succeeds
4. Either monitor conda-forge/hdmf_zarr-feedstock for the regro-cf-autotick-bot bot to create a PR updating the version of HDMF to the latest PyPI release, usually within 24 hours of release, or manually create a PR updating recipe/meta.yaml with the latest version number and SHA256 retrieved from PyPI > HDMF-Zarr > Download Files > View hashes for the .tar.gz file. Re-render and update dependencies as needed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.13%. Comparing base (573cf07) to head (968b983).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #218 +/- ## ======================================= Coverage 87.13% 87.13% ======================================= Files 5 5 Lines 1174 1174 Branches 287 287 ======================================= Hits 1023 1023 Misses 100 100 Partials 51 51 ```

:umbrella: View full report in Codecov by Sentry.
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