Fix XML element naming for collections and single items

[ttu]

Regardless of collection naming, elements in XML should be singularized / pluralized.

E.g. for endpoints
/api/family
/api/families

XML should be:

<families>
  <family>
    <id>

Current implementation has e.g. for /api/families

<families>
  <families_0>
    <id>

for /api/family

<family>
  <family_0>
    <id>

Implementation:

dotnet-fake-json-server/FakeServer/Common/Formatters/XmlOutputFormatter.cs

Line 65 in 9e37425

var itemName = ObjectHelper.GetCollectionFromPath(context.HttpContext.Request.Path.Value);

dotnet-fake-json-server/FakeServer/Common/Formatters/XmlOutputFormatter.cs

Line 55 in 9e37425

var children = itemCollection.Select((i, idx) => ((ExpandoObject)i).Aggregate(new XElement($"{name}_{idx}"), HandleExpandoField));

dotnet-fake-json-server/FakeServer/Common/Formatters/XmlOutputFormatter.cs

Line 39 in 9e37425

var children = innerList.Select((i, idx) => ((ExpandoObject)i).Aggregate(new XElement($"{fields.Key}_{idx}"), HandleExpandoField));

Mayble library like https://www.nuget.org/packages/Pluralize.NET.Core/ will do the trick?