Add a GHA to prevent backsliding on translation compilation

[MichaelChirico]

Follow-up to #6414.

I'm not 100% sure how stable the MD5 sum of the .mo binary is. But let's try & see. If that causes issues, we can probably use the msgunfmt output instead. If that's unstable too, we'll probably switch to {potools}, which can read the .po output of msgunfmt as a data.table where we can use all.equal() after appropriate normalization.

[MichaelChirico]

• Add a GHA to prevent backsliding on translation compilation #6415 👈
• Skip checking .po file if it's not edited on the current branch #6427
• Reorganize .po linters for extensibility, similarity to other checks #6426
• Add compiled translations #6414
• master

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[MichaelChirico]

It's not tested here (because the code-quality GHA only runs on PRs targeting master), but this should get GHA back to ✅. Merging the full stack now.

[MichaelChirico]

Merge activity

• Aug 31, 1:28 PM EDT: @MichaelChirico merged this pull request with Graphite.