[WON'T FIX] Tooling: Sync Gradle files from Maven POMs

Todo:

• generate tree model of a Maven multi-module project
• generate tree model of a Gradle multi-module project
• diff those 2 models into a deficiency model
• let a deficiency handler correct issues by directly modifying the local filesystem

Issues are:

• differences in settings.gradle as generated from Maven model vs Gradle model
  • auto generated from Maven model, can always override any existing in file system
• differences in dependencies.gradle as generated from Maven model vs Gradle model
  • optionally needs additional information for shortcut names on external dependencies (but we might just auto-generate these shortcut names aka library references)
  • auto generated from Maven model, can always override any existing in file system
• differences in build.gradle as generated from Maven model vs Gradle model
  • handle missing build.gradle file
  • there are open questions: clearly we don't want to support full build.gradle syntax, but just a minimal required subset