Prepare 4.0.0 release

[rly]

Prepare for release of HDMF 4.0.0 on Wednesday, January 22, 2025.

Before merging:

• Make sure all PRs to be included in this release have been merged to dev.
• Major and minor releases: Update dependency ranges in pyproject.toml and minimums in
  requirements-min.txt as needed.
• Check legal file dates and information in Legal.txt, license.txt, README.rst, docs/source/conf.py,
  and any other locations as needed
• Update pyproject.toml as needed
• Update README.rst as needed
• Update src/hdmf/common/hdmf-common-schema submodule as needed. Check the version number and commit SHA
  manually. Make sure we are using the latest release and not the latest commit on the main branch.
• Update changelog (set release date) in CHANGELOG.md and any other docs as needed
• Run tests locally including gallery tests, and inspect all warnings and outputs
  (pytest && python test_gallery.py). Try to remove all warnings.
• Run PyNWB tests locally including gallery and validation tests, and inspect all warnings and outputs
  (cd pynwb; git checkout dev; git pull; python test.py -v > out.txt 2>&1)
• Run HDMF-Zarr tests locally including gallery and validation tests, and inspect all warnings and outputs
  (cd hdmf-zarr; git checkout dev; git pull; pytest && python test_gallery.py)
• Test docs locally and inspect all warnings and outputs cd docs; make clean && make html
• 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/actions/workflows/run_all_tests.yml, selecting
  "Run workflow" on the right, selecting this branch, and clicking "Run workflow". Make sure all tests pass.
• 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 "stable" build runs and succeeds
4. Either monitor conda-forge/hdmf-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 > Download Files > View hashes for the .tar.gz file. Re-render and
   update the dependencies as needed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.87%. Comparing base (ab8cf3b) to head (682b6dc).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1232   +/-   ##
=======================================
  Coverage   90.87%   90.87%           
=======================================
  Files          42       42           
  Lines        9537     9537           
  Branches     1926     1926           
=======================================
  Hits         8667     8667           
  Misses        576      576           
  Partials      294      294           

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