BMI calculator example (#130)

bmi_calculator/lib/calculator/calculator_page.dart

@@ -0,0 +1,31 @@
+import 'package:bmi_calculator/calculator/calculator_body.dart';
+import 'package:flutter/material.dart';
+import 'package:bmi_calculator/body_model.dart';
+import 'package:bmi_calculator/palette.dart';
+
+class CalculatorPage extends StatelessWidget {
+  CalculatorPage({
+    Key? key,
+    required this.title,
+  }) : super(key: key);
+
+  final String title;
+
+  final BodyModel model = BodyModel(
+    sex: Sex.male,
+    height: 183,
+    weight: 74,
+    age: 19,
+  );
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+        backgroundColor: Palette.background,
+      ),
+      body: CalculatorBody(model: model),
+    );
+  }
+}