Move scoped_model_counter to provider_counter (#82)

I used `flutter create` anew, so the project structure now has additional 2 `AndroidManifest.xml` files. Everything else stayed the same, so from git’s perspective, it’s just moved files.

provider_counter/pubspec.yaml

@@ -0,0 +1,24 @@
+name: provider_counter
+description: >
+  The starter Flutter application, but using Provider to manage state.
+
+version: 1.0.0
+
+environment:
+  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  provider: ^2.0.1
+
+  cupertino_icons: ^0.1.2
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+
+flutter:
+  uses-material-design: true