Make the generic version for all overloads of FormatStructure in ILinksExtensions for all link address types (not only for ulong)

[Konard]

Data.Doublets/csharp/Platform.Data.Doublets/UInt64LinksExtensions.cs

Lines 94 to 100 in b739fe2

	public static string FormatStructure(this ILinks<ulong> links, ulong linkIndex, Func<Link<ulong>, bool> isElement, bool renderIndex = false, bool renderDebug = false)
	{
	var sb = new StringBuilder();
	var visited = new HashSet<ulong>();
	links.AppendStructure(sb, visited, linkIndex, isElement, (innerSb, link) => innerSb.Append(link.Index), renderIndex, renderDebug);
	return sb.ToString();
	}

Data.Doublets/csharp/Platform.Data.Doublets/UInt64LinksExtensions.cs

Lines 137 to 143 in b739fe2

	public static string FormatStructure(this ILinks<ulong> links, ulong linkIndex, Func<Link<ulong>, bool> isElement, Action<StringBuilder, Link<ulong>> appendElement, bool renderIndex = false, bool renderDebug = false)
	{
	var sb = new StringBuilder();
	var visited = new HashSet<ulong>();
	links.AppendStructure(sb, visited, linkIndex, isElement, appendElement, renderIndex, renderDebug);
	return sb.ToString();
	}