Replacing dependency updates Gradle plugin with Caupain

[Jolanrensen]

Fixes #1917
(Updated after #1924)

We gain two commands:

• checkDependencyUpdates, which checks our libs.versions.toml for outdated dependencies and outputs the results in the console and /build/reports/dependency-updates.md|html.
  • This report can also run from GH actions, manually or triggered on a time interval. This includes links to release notes if there are any! See here an example of what Caupain can output as Github action: https://github.com/Kotlin/dataframe/actions/runs/28795771151
• replaceOutdatedDependencies, which actually updates the versions in libs.versions.toml to the latest versions! This should be relatively safe since the convention plugin can be configured to filter out certain versions, and # ignoreUpdates can be used to exclude specific libraries/versions. However, each version bump should still be checked carefully. I'd recommend running replaceOutdatedDependencies, copy the new contents of libs.versions.toml, undo the changes, then compare the file with your clipboard. That way you can one-by-one bump and check :)

[Allex-Nik]

Great!
I've also run the new commands locally - everything works