refactor: move DateFormatter to child ns

OliverBooth/Formatting/DateFormatter.cs

@@ -1,7 +1,7 @@
 using System.Globalization;
 using SmartFormat.Core.Extensions;
 
-namespace OliverBooth;
+namespace OliverBooth.Formatting;
 
 /// <summary>
 ///     Represents a SmartFormat formatter that formats a date.

OliverBooth/Services/TemplateService.cs

@@ -4,6 +4,7 @@ using Markdig.Syntax;
 using Microsoft.EntityFrameworkCore;
 using OliverBooth.Data;
 using OliverBooth.Data.Web;
+using OliverBooth.Formatting;
 using OliverBooth.Markdown.Template;
 using SmartFormat;
 using SmartFormat.Extensions;