Add a script && workflow to check translation synchronisation

[SLUCHABLUB]

🧩 Summary

Adds a script && workflow to check translation synchronisation

🔗 Related issues (if any)

Closes #1187

💬 Other information

This adds a script to the dev directory. This made writing the workflow easier and as a side effect made the check easier to do locally.

I also removed the translation strings that only existed in one language. I do not think this will pose a problem since they were unusable anyway.

[SLUCHABLUB]

since they were unusable anyway

i forgot to account for the fact that we're using javascript

[Tomas-Ka]

Script looks great. Just a few things about the removed translation files.
Also, if you could add an entry to the package.json to allow running the translation check with pnpm translation-check or similar that would be great
For example by adding this:
"translation-check": "./dev/check_translations.sh" This could be added to theci-check` action as well, in which case we wouldn't need a separate workflow for it as it would already run in the existing one.

[Tomas-Ka]

well fuck
bad timing

[SLUCHABLUB]

I'll add it to package.json as well.

[SLUCHABLUB]

I've added it to package.json and moved the check into the existing CI workflow. I guess I thought it would be cleaner with a separate workflow but in hindsight, this is probably a lot better.

[Tomas-Ka]

I would like to have the new check-translations action in the general pnpm action for CI. After looking more closely at it I think it's reasonable to let this be it's own worker (instead of bundling it with everything else). I mostly pushed to consolidate since I believed the workflow used the pnpm ci-check command already

[SLUCHABLUB]

I did not add pnpm build since it was wack and seems to mutate files (I'm not totally sure what it "checks").

[Tomas-Ka]

this looks great, tyvm!