Support Gradle configuration cache #10
Description
The gradle plugin doesn't support configuration cache, which is preferred execution mode since Gradle 9.0.0. When running with configuration cache enabled I get:
1 problem was found storing the configuration cache.
- Task `:generateKtml` of type `dev.ktml.gradle.KtmlGenerateTask`: invocation of 'Task.project' at execution time is unsupported with the configuration cache.
See https://docs.gradle.org/9.2.1/userguide/configuration_cache_requirements.html#config_cache:requirements:use_project_during_execution