Improve error message when compiling a .js file

[lukahartwig]

Fixes #33585

I noticed this grammar error and saw that there already was an issue for it so I implemented the suggested changes.

[msftclas]

All CLA requirements met.

[orta]

Hi @lukahartwig - I really like this idea, I'm open to getting this in 👍 .

Is it possible that for the last part of the sentence, you first check whether we are looking at a JavaScript or JSON file first? (It might need two error messages then)

[lukahartwig]

Good point, I try to make it work.

[lukahartwig]

Okay, so I added two error messages for JS and JSON files. For other extensions, it will fall back to the old message. I might need some help with the wording since I'm not a native speaker.

I also wasn't able to reproduce the JSON file case with the baseline tests because apparentlyresolveJsonModule is already handled at an earlier stage. I'm not super familiar with the codebase though so maybe I missed something.

[orta]

This is great @lukahartwig - the messages read good to me, let's get this in. I think it makes sense to remove the JSON error message then I'll merge! Thanks!

[lukahartwig]

Cool, I removed the JSON error message. Thanks for your help :)

[orta]

Thanks for contributing!