fix(biome): use temp file instead of stdin

[redbmk]

biome handles utf8 characters differently between files and stdin, and in some cases can replace emojis with ascii characters when using stdin

refs: biomejs/biome#2604

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This is pretty small but I made sure to update the relevant test. Again, it will have minor conflicts with #4774, #4763, and #4773, but I wanted to keep the fixes focused.

Vader tests and linters are passing locally.

I have another change pending to add biome support for json and jsonc and clean up the options, but it sort of depends on some of these other PRs so I'll wait until these are resolved.

[hsanson]

Having a hard time figuring out why the Github actions seem to be stuck without any visible way to retry them.... maybe @w0rp can help here.

[redbmk]

@hsanson I think an approval might kick off the tests

At least 1 approving review is required by reviewers with write access.

Could be that it's stale or something though? I'll try pulling in the latest and updating my branch

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Edit: I get a slightly different message on mobile that maybe makes it more clear that's what's going on:

1 check awaiting approval

This workflow requires approval from a maintainer.

The other message I saw was unclear if approval was needed for the workflow or to actually merge.

Still not clear if the PR itself needs approval or if there's some other way to approve just the workflow.

[hsanson]

LGTM, thanks