CI: show off kaitai-struct-compiler unit tests
KSC includes unit tests, which are sometimes known as `translator-tests`. These technically are [ran during CI](https://github.com/kaitai-io/kaitai_struct/blob/2c37cb90165c737cd52d72bec42585266f408b38/.github/workflows/main.yml#L53-L56), but they known to be not 100% complete, and thus they don't break the build, but it's too hard to keep track of them at the moment.

It would be great to publish these results somewhere around https://ci.kaitai.io/ (maybe on a separate page?) and keep track of the progress.