The code/package detection in cmdInitNewProject only recognized 7 file
extensions and 5 package files, missing Android (Kotlin + Gradle), Flutter
(Dart + pubspec.yaml), C/C++, C#, Ruby, PHP, Scala, and others. This caused
new-project to treat brownfield projects in those ecosystems as greenfield,
skipping the codebase mapping step.
Added 18 code extensions and 11 package/build files to the detection lists.
Fixes#1325
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>