Implements a binary renderer for Pkl values, which is a lossless capturing of Pkl data.
This follows the pkl binary format that is already used with `pkl server` calls, and is
made available as a Java API and also an in-language API.
Also, introduces a binary parser into the corresponding `PObject` types in Java.
The current version of the kotlin-gradle plugin is not compatible with
Gradle 9.1, causing error `java.lang.NoSuchMethodError:
'org.gradle.api.Project org.gradle.api.artifacts.ProjectDependency.getDependencyProject()'`
Also, the Kotlin 2.0 language target is deprecated as of Kotlin 2.2.
* Update dependencies
1. Remove */gradle.lockfile files
2. Run `gradle updateDependencyLocks` and commit
* Update multi-JDK testing to use simple Test task, add junit-platform-launcher to dependencies
- Don't use JvmTestSuite (we don't use another test runner, we use the same classpath)
* Add junit-platform-launcher to libs (prevent an issue where junit-engine and junit-launcher can fall out of sync)
