message: Fix BravoPolicies.CustomTemplatesEnabled missing serialization
diff: [JsonPropertyName("builtInTemplatesEnabledPolicy")]
  public PolicyStatus BuiltInTemplatesEnabledPolicy { get; } = PolicyStatus.NotConfigured;
  - [JsonIgnore]
  - public bool CustomTemplatesEnabled { get; }
  + /// <remarks>This property is not exposed in the <see cref="UserSettings"/> because it is not to be set by the user. It's serialized in <see cref="BravoPolicies"/> for the sole purpose of allowing the UI to read its value</remarks>
  + [JsonPropertyName("customTemplatesEnabled")]
  + public bool CustomTemplatesEnabled { get; } // TODO: Add policy to the ADMX template
  [JsonPropertyName("customTemplatesEnabledPolicy")]
  public PolicyStatus CustomTemplatesEnabledPolicy { get; } = PolicyStatus.NotConfigured;
  