Add initial files (dart-lang/lints#1)

diff --git a/pkgs/lints/.gitignore b/pkgs/lints/.gitignore
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+++ b/pkgs/lints/.gitignore
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+# Files and directories created by pub
+.dart_tool/
+.packages
+
+# Omit commiting pubspec.lock for library packages:
+# https://dart.dev/guides/libraries/private-files#pubspeclock
+pubspec.lock
+
+# Directory created by dartdoc
+doc/api/
diff --git a/pkgs/lints/CHANGELOG.md b/pkgs/lints/CHANGELOG.md
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+++ b/pkgs/lints/CHANGELOG.md
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+## 0.1
+
+- Initial version
diff --git a/pkgs/lints/README.md b/pkgs/lints/README.md
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+This repo contains official Dart and Flutter lint rules.
diff --git a/pkgs/lints/pubspec.yaml b/pkgs/lints/pubspec.yaml
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+name: lints
+description: Official Dart and Flutter lint rules
+version: 0.1.0
+homepage: https://dart.dev/guides/language/effective-dart
+
+environment:
+  sdk: '>=2.12.0 <3.0.0'
+
+# dependencies:
+# dev_dependencies:
+# NOTE: Code is not allowed in this package. Do not add dependencies.