[linting_tool] Add Adaptive Layout with Theming (#852)

experimental/linting_tool/lib/layout/adaptive.dart

@@ -0,0 +1,23 @@
+// Copyright 2021 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:adaptive_breakpoints/adaptive_breakpoints.dart';
+import 'package:flutter/material.dart';
+
+/// Returns a boolean value whether the window is considered medium or large size.
+/// Used to build adaptive and responsive layouts.
+bool isDisplayLarge(BuildContext context) =>
+    getWindowType(context) >= AdaptiveWindowType.medium;
+
+/// Returns boolean value whether the window is considered medium size.
+/// Used to build adaptive and responsive layouts.
+bool isDisplayMedium(BuildContext context) {
+  return getWindowType(context) == AdaptiveWindowType.medium;
+}
+
+/// Returns boolean value whether the window is considered small size.
+/// Used to build adaptive and responsive layouts.
+bool isDisplaySmall(BuildContext context) {
+  return getWindowType(context) <= AdaptiveWindowType.small;
+}