ENH: add codespell linting (and tox.ini for that) + fix typos it found

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Codecov Report

Base: 66.22% // Head: 66.22% // No change to project coverage :thumbsup:

Coverage data is based on head (3d9a3d6) compared to base (01cf641). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #279 +/- ## ======================================= Coverage 66.22% 66.22% ======================================= Files 39 39 Lines 2209 2209 ======================================= Hits 1463 1463 Misses 746 746 ``` | [Impacted Files](https://codecov.io/gh/datalad/datalad-gooey/pull/279?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad) | Coverage Δ | | |---|---|---| | [datalad\_gooey/\_version.py](https://codecov.io/gh/datalad/datalad-gooey/pull/279/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9nb29leS9fdmVyc2lvbi5weQ==) | `100.00% <ø> (ø)` | | | [datalad\_gooey/api\_utils.py](https://codecov.io/gh/datalad/datalad-gooey/pull/279/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9nb29leS9hcGlfdXRpbHMucHk=) | `92.00% <ø> (ø)` | | | [datalad\_gooey/datalad\_ui.py](https://codecov.io/gh/datalad/datalad-gooey/pull/279/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9nb29leS9kYXRhbGFkX3VpLnB5) | `60.37% <ø> (ø)` | | | [datalad\_gooey/param\_form\_utils.py](https://codecov.io/gh/datalad/datalad-gooey/pull/279/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9nb29leS9wYXJhbV9mb3JtX3V0aWxzLnB5) | `86.73% <ø> (ø)` | | | [datalad\_gooey/param\_widgets.py](https://codecov.io/gh/datalad/datalad-gooey/pull/279/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#diff-ZGF0YWxhZF9nb29leS9wYXJhbV93aWRnZXRzLnB5) | `57.00% <ø> (ø)` | | 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=datalad). 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=datalad)

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[mih]

Thanks, that would be useful. However, I am concerned that it will trip over any keyboard navigation hint. You already added exceptions manually, but more are needed (and will be needed, already now and in the future).

Is there a way to ignore any words that have &?

[yarikoptic]

Is there a way to ignore any words that have &?

I think I have managed via --ignore-regex! Relevant ref: request for pragma definitions to skip lines: https://github.com/codespell-project/codespell/issues/1212

and your concern is confirmed in current fail here (did not see it locally)

lint run-test: commands[0] | codespell -x .codespell-ignorelines -D- --skip '_version.py,*.pem' datalad_gooey setup.py
datalad_gooey/resources/ui/credentials_dialog.ui:[11](https://github.com/datalad/datalad-gooey/actions/runs/3159329253/jobs/5142427042#step:5:12)1: ecret ==> secret, erect

[yarikoptic]

@mih -- green now, so "handing it off" ;)

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