Add fixture create_store_local to set up a store skeleton locally

[adswa]

This matches what #95 does, but at temporary local paths.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (62ef796) 97.23% compared to head (6e81d01) 96.87%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #97 +/- ## ========================================== - Coverage 97.23% 96.87% -0.36% ========================================== Files 16 16 Lines 325 352 +27 ========================================== + Hits 316 341 +25 - Misses 9 11 +2 ``` | [Files](https://app.codecov.io/gh/datalad/datalad-ria/pull/97?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad) | Coverage Δ | | |---|---|---| | [datalad\_ria/conftest.py](https://app.codecov.io/gh/datalad/datalad-ria/pull/97?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9yaWEvY29uZnRlc3QucHk=) | `100.00% <ø> (ø)` | | | [datalad\_ria/tests/test\_fixtures.py](https://app.codecov.io/gh/datalad/datalad-ria/pull/97?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9yaWEvdGVzdHMvdGVzdF9maXh0dXJlcy5weQ==) | `100.00% <100.00%> (ø)` | | | [datalad\_ria/tests/fixtures.py](https://app.codecov.io/gh/datalad/datalad-ria/pull/97?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9yaWEvdGVzdHMvZml4dHVyZXMucHk=) | `95.23% <90.47%> (-2.39%)` | :arrow_down: |

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[mih]

Thanks! If you don't mind, I would take this over and add a few more things that now become apparent to me.

[adswa]

go for it! :+1:

[mih]

Good point re the version. We may need to have multiple of these -- once I know what the versions do.