Add spell check and format check workflows

[patrickersing]

This PR introduces workflows for spell checking and format checking as done in Trixi.jl.
Furthermore, the PR sets additional permissions in ci.yml that are probably needed to delete old caches.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cd51eff) 100.00% compared to head (169e6ab) 100.00%.

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files            4         4           
  Lines           85        85           
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  Hits            85        85           

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[andrewwinters5000]

LGTM! I just had one question about the new permissions set in the ci.yml. Are these the ones that @sloede mentioned should be activated by default, which is why we do not set them in the Trixi ci?

[patrickersing]

LGTM! I just had one question about the new permissions set in the ci.yml. Are these the ones that @sloede mentioned should be activated by default, which is why we do not set them in the Trixi ci?

Yes, @sloede mentioned that they should be activated by default. However, I observed some problems were old caches were not deleted so I wanted to try and set the permissions as suggested in https://github.com/julia-actions/cache

[sloede]

LGTM!

[andrewwinters5000]

LGTM!

[patrickersing]

In the first new CI runs here the caches now get deleted. So it seems like setting the permissions explicitly was actually necessary.