Have the prompt check for a clean tree before setup - #2

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: gradle/actions/setup-gradle@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

serializable class io.github.autor3search.measure.Interleave.Cancelled has no definition of serialVersionUID

serializable class io.github.autor3search.git.Git.GitException has no definition of serialVersionUID

serializable class io.github.autor3search.freeze.FreezeException has no definition of serialVersionUID

serializable class io.github.autor3search.config.ConfigException has no definition of serialVersionUID

serializable class io.github.autor3search.cli.RunRef.ResolveException has no definition of serialVersionUID

auto-closeable resource claim is never referenced in body of corresponding try statement

serializable class io.github.autor3search.cli.ConfigLoading.LoadException has no definition of serialVersionUID

serializable class io.github.autor3search.build.BuildToolException has no definition of serialVersionUID

serializable class io.github.autor3search.bench.BenchException has no definition of serialVersionUID