Replace pub run usages with dart run (#2777)

Following up on https://github.com/dart-lang/pub/issues/4737, this PR
replaces deprecated `pub run` commands with `dart run`.

add_to_app/books/README.md

@@ -38,7 +38,7 @@ page.
   * If the `schema.dart` is modified, the generated classes can be updated with
 
       ```bash
-      flutter pub run pigeon --input pigeon/schema.dart \
+      dart run pigeon --input pigeon/schema.dart \
         --dart_out lib/api.dart \
         --objc_header_out ../ios_books/IosBooks/api.h \
         --objc_source_out ../ios_books/IosBooks/api.m \

add_to_app/books/flutter_module_books/README.md

@@ -16,7 +16,7 @@ in `pigeon/schema.dart` is updated, the generated classes can also be re-
 generated using:
 
 ```shell
-flutter pub run pigeon --input pigeon/schema.dart \
+dart run pigeon --input pigeon/schema.dart \
   --dart_out lib/api.dart \
   --objc_header_out ../ios_books/IosBooks/api.h \
   --objc_source_out ../ios_books/IosBooks/api.m \

add_to_app/books/flutter_module_books/run_pigeon.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-flutter pub run pigeon --input pigeon/schema.dart \
+dart run pigeon --input pigeon/schema.dart \
   --dart_out lib/api.dart \
   --objc_header_out ../ios_books/IosBooks/api.h \
   --objc_source_out ../ios_books/IosBooks/api.m \

desktop_photo_search/fluent_ui/tool/grind.dart

@@ -32,7 +32,7 @@ Future<void> generateJsonBindings() async => _logProcessOutput(
 
 @Task()
 Future<void> watch() async => _logProcessOutput(
-  Process.start('flutter', ['pub', 'run', 'build_runner', 'watch']),
+  Process.start('dart', ['run', 'build_runner', 'watch']),
 );
 
 @Task()

desktop_photo_search/material/tool/grind.dart

@@ -32,7 +32,7 @@ Future<void> generateJsonBindings() async => _logProcessOutput(
 
 @Task()
 Future<void> watch() async => _logProcessOutput(
-  Process.start('flutter', ['pub', 'run', 'build_runner', 'watch']),
+  Process.start('dart', ['run', 'build_runner', 'watch']),
 );
 
 @Task()

game_template/README.md

@@ -69,7 +69,7 @@ lib
 
 The state management approach is intentionally low-level. That way, it's easy to
 take this project and run with it, without having to learn new paradigms, or having
-to remember to run `flutter pub run build_runner watch`. You are,
+to remember to run `dart run build_runner watch`. You are,
 of course, encouraged to use whatever paradigm, helper package or code generation
 scheme that you prefer.
 
@@ -522,7 +522,7 @@ To update the launcher icon, first change the files
 Then, run the following:
 
 ```bash
-flutter pub run flutter_launcher_icons:main
+dart run flutter_launcher_icons:main
 ```
 
 You can [configure](https://github.com/fluttercommunity/flutter_launcher_icons#book-guide)

pedometer/ffigen.yaml

@@ -1,4 +1,4 @@
-# Run with `flutter pub run ffigen --config ffigen.yaml`.
+# Run with `dart run ffigen --config ffigen.yaml`.
 name: PedometerBindings
 description: "Bindings for CM pedometers"
 language: objc