Add melos code generation commands

Author: RutgerVromans

melos.yaml

@@ -3,7 +3,22 @@ packages:
   - /**
 scripts:
   analyze: melos exec -- flutter analyze
+
   format: melos exec -- flutter format .
+
   get: melos exec -- flutter pub get
+
   unittest: 
     run: melos exec -- flutter test
+
+  generate:
+    run: melos run generate:dart && melos run generate:flutter
+    description: Build all generated files for Dart & Flutter packages in this project.
+
+  generate:dart:
+    run: melos exec -c 1 --depends-on="build_runner" --no-flutter -- "dart run build_runner build --delete-conflicting-outputs"
+    description: Build all generated files for Dart packages in this project.
+
+  generate:flutter:
+    run: melos exec -c 1 --depends-on="build_runner" --flutter -- "flutter pub run build_runner build --delete-conflicting-outputs"
+    description: Build all generated files for Flutter packages in this project.