Update build config, add more Kotlin/Native targets, update GitHub Workflows

[aSemy]

Update build config, add more Kotlin/Native targets, update GitHub Workflows

It's a big PR! Let me know if you want to break it down into smaller PRs.

fix #98

Summary

Kotlin

• Added Kotlin/Native targets
• updated GitHub workflow to use macOS for publishing, because only macOS supports building all Kotlin targets
• Enabled Kotlin/JS NodeJS target

Gradle updates

• Update Gradle to 8.2
• Move versions & dependencies to version catalog
• enable most Kotlin/Native targets
• move Gradle build logic to buildSrc convention plugins (so the build.gradle.kts in the project is more succinct and focused)
• enable Gradle Build Cache
• Gradle Plugin versions are now defined in libs.versions.toml and are specified for the whole project in buildSrc/build.gradle.kts
• Use centralised repository declarations

update GitHub CI workflows

• use the Gradle Build Action, which better supports caching
• Add concurrency cancellation (this is very useful for build.yaml, because if lots of commits are pushed concurrently then the Action queue won't get clogged up)
• Removed paths-ignore - it's nice to keep the config simpler and Gradle caching will mean that the Gradle tasks run much faster if non-code files are changed
• Cache Kotlin Konan directory
• Use a matrix to run the build on all machines, to verify all target work

Verification

I verified that local publishing works by running ./gradlew publishAllPublicationsToProjectLocalRepository and checking the contents of build/maven-project-local - everything seemed to be in order, but please double check that the signing works since you have the signing secrets.

[Quillraven]

I think I forgot to press a button yesterday and you couldn't see my feedback.

Should be okay now, I hope 😅

[Quillraven]

Let's clarify how the future workflow can look like to publish SNAPSHOT releases automatically and real stable releases manually. Then, imo, we are good to go with this PR and can merge it. I will do some tests then on the weekend.

Thanks a lot for your contribution!

[Quillraven]

Everything is clear on my side. Please update version to 2.4-SNAPSHOT then we are good to go with the merge imo! Great job 👍