When we updated spotless's Java and Kotlin formatter, we changed the underlying
formatting rules.
However, due to spotless ratcheting, these formatting changes don't get applied unless a file
gets touched in a commit.
To avoid future PRs introducing lines of change that aren't related to the intention of the PR,
this is a one-time format of all files.
- update Kotlin from 1.7.10 to 2.0.21
- Kotlin 1.6 dependencies in Gradle lock files are expected because kotlinc,
which is also used by some tests, internally uses some 1.6 dependencies
for backwards compatibility reasons.
- update kotlinx-html and kotlinx-serialization
- adapt Kotlin code where necessary
- use Kotlin stdlib Path APIs where possible
- fix IntelliJ Kotlin inspection warnings
- reformat code with `./gradlew spotlessApply`
- ktfmt adds lots of trailing commas
- Add workaround to fix IntelliJ "unresolved reference" errors
