Rename slash commands from /chat2 to /hellion family

Hellion Chat is an independent fork with its own assembly name and
plugin slot, but it kept registering the upstream /chat2* slash
commands. That mixed naming caused two friction points: users could
not tell from the in-game help which plugin owned the command, and
running both Hellion Chat and the upstream Chat 2 side by side would
collide on the registration.

Five commands change:

  /chat2          -> /hellion           (settings + chat toggle)
  /chat2Viewer    -> /hellionView       (database viewer)
  /chat2Debugger  -> /hellionDebugger   (internal, not shown in help)
  /chat2SeString  -> /hellionSeString   (internal, debug-only)
  /clearlog2      -> /clearhellion      (clear chat log)

Help strings ("Perform various actions with Chat 2.", "Clear the
Chat 2 chat log") are reworded to match. ImGui internal window IDs
(###chat2-settings, ###chat2-dbviewer) are left untouched on purpose
so existing user layouts for those windows do not snap back to
default. Resource files do not reference any of these command names,
so no localisation work needed.

ChatTwo/Ui/ChatLogWindow.cs

@@ -99,8 +99,8 @@ public sealed class ChatLogWindow : Window
         SetUpTextCommandChannels();
         SetUpAllCommands();
 
-        Plugin.Commands.Register("/clearlog2", "Clear the Chat 2 chat log").Execute += ClearLog;
-        Plugin.Commands.Register("/chat2").Execute += ToggleChat;
+        Plugin.Commands.Register("/clearhellion", "Clear the Hellion Chat log").Execute += ClearLog;
+        Plugin.Commands.Register("/hellion").Execute += ToggleChat;
 
         Plugin.ClientState.Login += Login;
         Plugin.ClientState.Logout += Logout;
@@ -115,8 +115,8 @@ public sealed class ChatLogWindow : Window
         Plugin.AddonLifecycle.UnregisterListener(AddonEvent.PostUpdate, "ActionDetail", PayloadHandler.MoveTooltip);
         Plugin.ClientState.Logout -= Logout;
         Plugin.ClientState.Login -= Login;
-        Plugin.Commands.Register("/chat2").Execute -= ToggleChat;
-        Plugin.Commands.Register("/clearlog2").Execute -= ClearLog;
+        Plugin.Commands.Register("/hellion").Execute -= ToggleChat;
+        Plugin.Commands.Register("/clearhellion").Execute -= ClearLog;
     }
 
     private void Logout(int _, int __)

ChatTwo/Ui/DbViewer.cs

@@ -76,12 +76,12 @@ public class DbViewer : Window
         RespectCloseHotkey = false;
         DisableWindowSounds = true;
 
-        Plugin.Commands.Register("/chat2Viewer", "Get access to your message history, with simple filter options.", true).Execute += Toggle;
+        Plugin.Commands.Register("/hellionView", "Get access to your message history, with simple filter options.", true).Execute += Toggle;
     }
 
     public void Dispose()
     {
-        Plugin.Commands.Register("/chat2Viewer", "Get access to your message history, with simple filter options.", true).Execute -= Toggle;
+        Plugin.Commands.Register("/hellionView", "Get access to your message history, with simple filter options.", true).Execute -= Toggle;
     }
 
     private void Toggle(string _, string __) => Toggle();

ChatTwo/Ui/Debugger.cs

@@ -28,12 +28,12 @@ public class DebuggerWindow : Window
         RespectCloseHotkey = false;
         DisableWindowSounds = true;
 
-        Plugin.Commands.Register("/chat2Debugger", showInHelp: false).Execute += Toggle;
+        Plugin.Commands.Register("/hellionDebugger", showInHelp: false).Execute += Toggle;
     }
 
     public void Dispose()
     {
-        Plugin.Commands.Register("/chat2Debugger", showInHelp: false).Execute -= Toggle;
+        Plugin.Commands.Register("/hellionDebugger", showInHelp: false).Execute -= Toggle;
     }
 
     private void Toggle(string _, string __) => Toggle();

ChatTwo/Ui/SeStringDebugger.cs

@@ -30,14 +30,14 @@ public class SeStringDebugger : Window
         DisableWindowSounds = true;
 
         #if DEBUG
-        Plugin.Commands.Register("/chat2SeString", showInHelp: false).Execute += Toggle;
+        Plugin.Commands.Register("/hellionSeString", showInHelp: false).Execute += Toggle;
         #endif
     }
 
     public void Dispose()
     {
         #if DEBUG
-        Plugin.Commands.Register("/chat2SeString", showInHelp: false).Execute -= Toggle;
+        Plugin.Commands.Register("/hellionSeString", showInHelp: false).Execute -= Toggle;
         #endif
     }
 

ChatTwo/Ui/Settings.cs

@@ -52,14 +52,14 @@ public sealed class SettingsWindow : Window
 
         Initialise();
 
-        Plugin.Commands.Register("/chat2", "Perform various actions with Chat 2.").Execute += Command;
+        Plugin.Commands.Register("/hellion", "Perform various actions with Hellion Chat.").Execute += Command;
         Plugin.Interface.UiBuilder.OpenConfigUi += Toggle;
     }
 
     public void Dispose()
     {
         Plugin.Interface.UiBuilder.OpenConfigUi -= Toggle;
-        Plugin.Commands.Register("/chat2").Execute -= Command;
+        Plugin.Commands.Register("/hellion").Execute -= Command;
     }
 
     private void Command(string command, string args)