Create analysis_defaults package (#1654)

* Create `analysis_defaults` package

* Update analysis_defaults/pubspec.yaml

Co-authored-by: Pierre-Louis <6655696+guidezpl@users.noreply.github.com>

---------

Co-authored-by: Pierre-Louis <6655696+guidezpl@users.noreply.github.com>

analysis_defaults/.gitignore

@@ -0,0 +1,3 @@
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
+.dart_tool/

analysis_defaults/lib/flutter.yaml

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+include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  language:
+    strict-casts: true
+    strict-inference: true
+
+linter:
+  rules:
+    avoid_types_on_closure_parameters: true
+    avoid_void_async: true
+    cancel_subscriptions: true
+    close_sinks: true
+    directives_ordering: true
+    package_api_docs: true
+    package_prefixed_library_names: true
+    test_types_in_equals: true
+    throw_in_finally: true
+    unawaited_futures: true
+    unnecessary_statements: true
+    use_super_parameters: true

analysis_defaults/pubspec.yaml

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+name: analysis_defaults
+description: Analysis defaults for flutter/samples
+publish_to: none
+
+environment:
+  sdk: '>=2.19.0-0 <4.0.0'
+
+# NOTE: Code is not allowed in this package. Do not add dependencies.
+dependencies:
+  flutter_lints: ^2.0.1