Update formatcheck to use Runic

[lkdvos]

This changes the format checker to use Runic instead of JuliaFormatter.

Importantly however, as we are not using any semantic versioning for our github actions, this more or less means that all format checks across our ecosystem will now start failing until we change all packages to use runic. In principle I'm okay with that because it forces us to go ahead and implement this everywhere, but it is definitely something to consider.

[mtfishman]

It looks like https://github.com/ITensor/ITensorActions/blob/5591d0a32ed2c2cd24c7b0f4fe748fdd1ec7b02b/.github/workflows/FormatPullRequest.yml and https://github.com/ITensor/ITensorActions/blob/5591d0a32ed2c2cd24c7b0f4fe748fdd1ec7b02b/.github/workflows/FormatSuggest.yml also need to be switched over to Runic.

[lkdvos]

It depends a bit on what we want. This action already has a switch for the format suggestion, which can be enabled with format-suggestions: true and is currently on by default. I can try and play around with the PR version as well, but are we using that anywhere? I am not super excited about fighting with github actions again for this if we aren't using it 😉. I can delete these other actions if you want?

[lkdvos]

Let me just check and see if this is actually working, I'll try and get a test repo up and running tomorrow

[lkdvos]

Seems to all work, ready for merging! (I have no clue why the pre-commit ci keeps reporting failures everywhere, and I don't think I have the permissions to access these settings)

https://github.com/ITensor/TestPackage/pull/2
https://github.com/ITensor/TestPackage/actions/runs/18127858780/job/51587351483

[mtfishman]

(I have no clue why the pre-commit ci keeps reporting failures everywhere, and I don't think I have the permissions to access these settings)

The pre-commit.ci check expects a .pre-commit-config.yaml file, i.e. https://github.com/ITensor/BlockSparseArrays.jl/blob/main/.pre-commit-config.yaml, I guess there isn't any harm adding one to this repository (the CI check is slightly annoying since you can either enable it one-by-one in each repository, which is not fun, or run it on every repository in the Github organization, which is fine until there is a repository like this one where we might not need it).

Also I noticed that we will need to update the .pre-commit-config.yamls across all of the repositories to switch them over to Runic: https://github.com/ITensor/BlockSparseArrays.jl/blob/1a474f59f65b7ada867f3fe3e2fb3f3c70c83ed8/.pre-commit-config.yaml#L14.

ITensor/TestPackage#2 https://github.com/ITensor/TestPackage/actions/runs/18127858780/job/51587351483

Looks great, thanks for getting that set up and double checking it works!

[lkdvos]

Yes, the update of .pre-commit-config.yml for the packages is part of the update to the skeleton, I'll add a pre-commit here as well then.