Add a lint check for trait placement on hardcoded actor names.

OpenRA.Mods.Common/Commands/ChatCommands.cs

@@ -16,6 +16,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Commands
 {
+	[TraitLocation(SystemActors.World)]
 	[Desc("Enables commands triggered by typing them into the chatbox. Attach this to the world actor.")]
 	public class ChatCommandsInfo : TraitInfo<ChatCommands> { }
 

OpenRA.Mods.Common/Commands/DebugVisualizationCommands.cs

@@ -16,6 +16,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Commands
 {
+	[TraitLocation(SystemActors.World)]
 	[Desc("Enables visualization commands via the chatbox. Attach this to the world actor.")]
 	public class DebugVisualizationCommandsInfo : TraitInfo<DebugVisualizationCommands> { }
 

OpenRA.Mods.Common/Commands/DevCommands.cs

@@ -17,6 +17,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Commands
 {
+	[TraitLocation(SystemActors.World)]
 	[Desc("Enables developer cheats via the chatbox. Attach this to the world actor.")]
 	public class DevCommandsInfo : TraitInfo<DevCommands> { }
 

OpenRA.Mods.Common/Commands/HelpCommand.cs

@@ -15,6 +15,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Commands
 {
+	[TraitLocation(SystemActors.World)]
 	[Desc("Shows a list of available commands in the chatbox. Attach this to the world actor.")]
 	public class HelpCommandInfo : TraitInfo<HelpCommand> { }
 

OpenRA.Mods.Common/Commands/PlayerCommands.cs

@@ -14,6 +14,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Commands
 {
+	[TraitLocation(SystemActors.World)]
 	[Desc("Allows the player to pause or surrender the game via the chatbox. Attach this to the world actor.")]
 	public class PlayerCommandsInfo : TraitInfo<PlayerCommands> { }