Introduce hatch-managed environments

[candleindark]

Summary

This PR introduces hatch-managed environments
to the project, providing a convenient way to quickly set up clean,
relevant environments for development. This change does not affect the
build or any other aspect of the project.

• Add hatch environments (extensions, extras, style, test,
  tools, all), each corresponding to a project extra, using uv
  as the installer for fast environment setup
• Add DANDI_PAGINATION_DISABLE_FALLBACK env var and a run script
  (hatch run test:run) to the test environment
• Update CLAUDE.md and DEVELOPMENT.md to document hatch usage

Test plan

• hatch run test:run runs tests in dandi/tests
• CI passes

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.10%. Comparing base (f14c1ee) to head (637faef).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1831      +/-   ##
==========================================
- Coverage   75.13%   75.10%   -0.03%     
==========================================
  Files          85       85              
  Lines       11932    11932              
==========================================
- Hits         8965     8962       -3     
- Misses       2967     2970       +3     

Flag	Coverage Δ
unittests	75.10% <ø> (-0.03%)	⬇️

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[yarikoptic]

uff, if only for you since I personally do not use hatch and prefer tox. @CodyCBakerPhD @asmacdo do you use hatch or tox or neither?

[CodyCBakerPhD]

I do not use hatch

[asmacdo]

I use tox, not attached to it but it gets the job done. I haven't really used hatch.

[candleindark]

uff, if only for you since I personally do not use hatch and prefer tox. @CodyCBakerPhD @asmacdo do you use hatch or tox or neither?

Well, in this team, it is only for me then. However, it is possible that there are people outside of this team find the setup useful/convenient. As it is noted in the top post of this PR, the changes in this PR don't add or modify any existing setup but just add the option of using Hatch-managed environments.

[candleindark]

The main goal for me really is to replace

dandi-cli/DEVELOPMENT.md

Lines 9 to 13 in f14c1ee

	git clone https://github.com/dandi/dandi-cli \
	&& cd dandi-cli \
	&& virtualenv --system-site-packages --python=python3 venvs/dev3 \
	&& source venvs/dev3/bin/activate \
	&& pip install -e ".[test]"

with just hatch shell test which also has the need environment variable set for testing as in https://github.com/candleindark/dandi-cli/blob/6b56e0220a5547636786b483c918d7d206173694/pyproject.toml#L236-L241

and I can just delete the environment with hatch env remove test to start again with the environment as defined in pyproject.toml afresh again.