ENH: Add image writer

[ntatsisk]

Aims to fix https://github.com/InsightSoftwareConsortium/napari-itk-io/issues/7. It will also be helpful for the elastix-napari plugin to write the result image from the registration (https://github.com/SuperElastix/elastix_napari/tree/main).

It is pretty barebones right now. @thewtex any ideas what else should be added? Should it support writing dicoms?

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +3.01 :tada:

Comparison is base (cc08680) 88.05% compared to head (36bdf60) 91.07%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #9 +/- ## ========================================== + Coverage 88.05% 91.07% +3.01% ========================================== Files 5 5 Lines 134 168 +34 ========================================== + Hits 118 153 +35 + Misses 16 15 -1 ``` | [Impacted Files](https://codecov.io/gh/InsightSoftwareConsortium/napari-itk-io/pull/9?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InsightSoftwareConsortium) | Coverage Δ | | |---|---|---| | [src/napari\_itk\_io/\_tests/test\_writer.py](https://codecov.io/gh/InsightSoftwareConsortium/napari-itk-io/pull/9?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InsightSoftwareConsortium#diff-c3JjL25hcGFyaV9pdGtfaW8vX3Rlc3RzL3Rlc3Rfd3JpdGVyLnB5) | `100.00% <100.00%> (ø)` | | | [src/napari\_itk\_io/\_writer.py](https://codecov.io/gh/InsightSoftwareConsortium/napari-itk-io/pull/9?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InsightSoftwareConsortium#diff-c3JjL25hcGFyaV9pdGtfaW8vX3dyaXRlci5weQ==) | `87.50% <100.00%> (+31.94%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InsightSoftwareConsortium). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InsightSoftwareConsortium)

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[ntatsisk]

Thanks @thewtex, I rebased it. Let me know if I should anything else here!

[ntatsisk]

Hi @thewtex, @dzenanz, it looks like the merge itself failed for macos py3.9.

In addition, do you think that it makes sense to release a new version of napari-itk-io? So that, for example, users of elastix-napari can start using this writer feature. Thanks.

[dzenanz]

Re-running the failed jobs for that commit did not help. The error message is:

Run GabrielBB/xvfb-action@v1
  with:
    run: python -m tox
  env:
    pythonLocation: /Users/runner/hostedtoolcache/Python/3.9.16/x64
    PLATFORM: macos-latest
/Users/runner/hostedtoolcache/Python/3.9.16/x64/bin/python -m tox
py39-macos: install_deps> python -I -m pip install itk-io itk-napari-conversion napari numpy pyqt5 pytest pytest-cov pytest-qt qtpy
ERROR: THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS FILE. If you have updated the package versions, please update the hashes. Otherwise, examine the package contents carefully; someone may have tampered with them.
    itk-io from https://files.pythonhosted.org/packages/[2](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:2)d/9a/d66ef998dada9c4797c9b8be57a171cf01[3](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:3)61ebb1cb77699ab8306c[4](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:4)fc84/itk_io-[5](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:5).3.0-cp39-cp39-macosx_10_9_x8[6](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:6)_64.whl:
        Expected sha256 888c1a58[7](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:8)e7f11796d9a6[8](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:9)0a23a713[9](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:10)29928c22daf4af216199ced181f34d8e7
             Got        fc62d5b67b3064d0429599f93e36804e78a14fb8076e33f7b42e66e52e3ab94f

Collecting itk-io
  Downloading itk_io-5.3.0-cp39-cp39-macosx_[10](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:11)_9_x86_64.whl (24.3 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━                 14.7/24.3 MB 1.9 MB/s eta 0:00:06
py39-macos: exit 1 (7.51 seconds) /Users/runner/work/napari-itk-io/napari-itk-io> python -I -m pip install itk-io itk-napari-conversion napari numpy pyqt5 pytest pytest-cov pytest-qt qtpy pid=[11](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:12)22
  py39-macos: FAIL code 1 (8.34 seconds)
  evaluation failed :( (8.47 seconds)
::error::The process '/Users/runner/hostedtoolcache/Python/3.9.[16](https://github.com/InsightSoftwareConsortium/napari-itk-io/actions/runs/4801366500/jobs/8543472595#step:7:17)/x64/bin/python' failed with exit code 1

I guess a new update is needed. I don't know whether package releases are fully automated in this repository.

[thewtex]

I restarted the CI -- it passed after a restart.

I tagged a new release, v0.3.0, for deployment :tada:

@ntatsisk you should receive an invitation for permissions on the repository to create future releases.