chore: adjust dart_frog_test/example to use dart_frog_lint (#1836)

Author: felangel

packages/dart_frog_test/example/analysis_options.yaml

@@ -1,7 +1 @@
-include: package:very_good_analysis/analysis_options.5.1.0.yaml
-analyzer:
-  exclude:
-    - build/**
-linter:
-  rules:
-    file_names: false
+include: package:dart_frog_lint/recommended.yaml

packages/dart_frog_test/example/pubspec.yaml

@@ -10,8 +10,8 @@ dependencies:
   dart_frog: ^1.0.0
 
 dev_dependencies:
+  dart_frog_lint: ^0.1.0
   dart_frog_test:
     path: ../
   mocktail: ^1.0.0
   test: ^1.19.2
-  very_good_analysis: ^5.1.0