Add UI element that displays model compiling status

[devanlooches]

No description provided.

[hannobraun]

Thank you, @devanlooches!

This looks almost good to merge now, but the CI build still fails, specifically the cargo fmt and cargo clippy steps.

You should be able to take care of formatting automatically by running cargo fmt and just committing the result. You can fix the Clippy error by running cargo clippy and following its suggestion.

To get a feel for whether the CI build will pass, you can run just build locally, as documented here: https://github.com/hannobraun/Fornjot/blob/main/CONTRIBUTING.md#making-improvements

[devanlooches]

For some reason the CI build passes. However locally when I ran just build it failed with a linker error on the export validator step.

[hannobraun]

Thank you, @devanlooches, looks good!

[hannobraun]

Oh, I forgot to reply to this:

However locally when I ran just build it failed with a linker error on the export validator step.

That's sounds like a bug! Could you open an issue with the full error message? Maybe it's something platform-specific, or I have something installed that's missing on your machine.