Add PlatformIdentifier

src/Tgstation.Server.Host/Core/PlatformIdentifier.cs

@@ -0,0 +1,19 @@
+using System.Runtime.InteropServices;
+
+namespace Tgstation.Server.Host.Core
+{
+	/// <inheritdoc />
+	sealed class PlatformIdentifier : IPlatformIdentifier
+	{
+		/// <inheritdoc />
+		public bool IsWindows { get; }
+
+		/// <summary>
+		/// Construct a <see cref="PlatformIdentifier"/>
+		/// </summary>
+		public PlatformIdentifier()
+		{
+			IsWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+		}
+	}
+}