migrate from 'flutter pub run' to 'dart run' (#2757)

---------

Co-authored-by: Remi Rousselet <[email protected]>

examples/counter/README.md

@@ -0,0 +1,6 @@
+The standard Flutter Counter example built with [Riverpod]
+
+This uses `ProvidedScope`.
+
+
+[riverpod]: https://github.com/rrousselGit/riverpod

examples/marvel/README.md

@@ -45,7 +45,7 @@ Where `public_key` and `private_key` are obtained from https://developer.marvel.
 Since this project uses [freezed](https://pub.dev/packages/freezed) for code generation, be sure to run the generator with the following command before attempting to build/run the application:
 
 ```sh
-flutter pub run build_runner build
+dart run build_runner build -d
 ```
 
 [riverpod]: https://github.com/rrousselGit/riverpod

examples/pub/README.md

@@ -1,25 +1,25 @@
 # Pub
 
-Install needed global packages
+## Install needed global packages
 
 ```bash
 cd riverpod
 dart pub global activate melos
 ```
 
-Build the riverpod packages
+## Build the Example App
 
+Run the code generation
 ```bash
+cd examples/pub
 flutter pub get
+dart run build_runner build -d
 ```
 
-## Start the Example App
+## Run the Example App
 
+Create and run the android deployable
 ```bash
-cd examples/pub
-flutter pub run build_runner build
-
-
 flutter create . --platforms android
 flutter run
 ```

examples/random_number/README.md

@@ -1,6 +1,6 @@
 # random_number
 
-A new Flutter project.
+A random number generator similar to the counter project.  It has a single button that generates a random number.
 
 ## Getting Started
 

examples/stackoverflow/README.md

@@ -11,5 +11,5 @@ This can be done with:
 
 ```sh
 cd examples/stackoverflow
-flutter pub run build_runner build --delete-conflicting-outputs
+dart run build_runner build -d
 ```

packages/riverpod_generator/integration/build_yaml/README.md

@@ -17,7 +17,7 @@ fluttter pub get
 
 ```bash
 cd examples/build_yaml
-flutter pub run build_runner build
+dart run build_runner build
 
 flutter test
 ```