Reorganize commands into the Commands folder (#2679)

* Reorganize commands into the Commands folder

* RIDER

Content.Server/Commands/Damage/AddDamageFlagCommand.cs

@@ -0,0 +1,27 @@
+#nullable enable
+using Content.Server.Administration;
+using Content.Shared.Administration;
+using Robust.Server.Interfaces.Console;
+using Robust.Server.Interfaces.Player;
+
+namespace Content.Server.Commands.Damage
+{
+    [AdminCommand(AdminFlags.Fun)]
+    public class AddDamageFlagCommand : DamageFlagCommand
+    {
+        public override string Command => "adddamageflag";
+        public override string Description => "Adds a damage flag to your entity or another.";
+        public override string Help => $"Usage: {Command} <flag> / {Command} <entityUid> <flag>";
+
+        public override void Execute(IConsoleShell shell, IPlayerSession? player, string[] args)
+        {
+            if (!TryGetEntity(shell, player, args, true, out var entity, out var flag, out var damageable))
+            {
+                return;
+            }
+
+            damageable.AddFlag(flag);
+            shell.SendText(player, $"Added damage flag {flag} to entity {entity.Name}");
+        }
+    }
+}