Set the default value to fitInWeek to true

This is the same behaviour as in the web application is what most people
most like will be doing anyway.

lib/models/workouts/base_config.g.dart

@@ -28,7 +28,7 @@ BaseConfig _$BaseConfigFromJson(Map<String, dynamic> json) {
     value: stringOrIntToNum(json['value']),
     operation: json['operation'] as String? ?? 'r',
     step: json['step'] as String? ?? 'abs',
-    requirements: json['requirements'] ?? null,
+    requirements: json['requirements'] as Map<String, dynamic>? ?? null,
   );
 }
 

lib/models/workouts/routine.dart

@@ -98,7 +98,7 @@ class Routine {
     created = DateTime.now();
     start = DateTime.now();
     end = DateTime.now().add(const Duration(days: DEFAULT_DURATION * 7));
-    fitInWeek = false;
+    fitInWeek = true;
   }
 
   // Boilerplate