Establish UE 5.8 known-good baseline with Batch 1 archaeology docs.

Initialize Git with LFS for binary assets and add standard Unreal Engine .gitignore/.gitattributes.

Co-authored-by: Cursor <cursoragent@cursor.com>

Source/REALMSINRUIN.Target.cs

@@ -0,0 +1,16 @@
+// Copyright Trevor Edwards
+
+using UnrealBuildTool;
+using System.Collections.Generic;
+
+public class REALMSINRUINTarget : TargetRules
+{
+	public REALMSINRUINTarget(TargetInfo Target) : base(Target)
+	{
+		Type = TargetType.Game;
+		DefaultBuildSettings = BuildSettingsVersion.V7;
+		IncludeOrderVersion = EngineIncludeOrderVersion.Unreal5_8;
+
+		ExtraModuleNames.AddRange( new string[] { "REALMSINRUIN" } );
+	}
+}