Grouping by folder inside project group

[anggaaryas]

Is your feature request related to a problem? Please describe. not a problem, but improvement

Describe the solution you'd like Grouping by folder inside project group.

Describe alternatives you've considered for example:

// 🌎 Project imports:

../aaa/bbb/foo.dart
../aaa/bbb/bar.dart

../aaa/ccc/ttt.dart
../aaa/ccc/eee.dart
../aaa/ccc/fff.dart

../zzz/ppp.dart