refactor(namespace): rename ChatTwo.* to HellionChat.* across all source files

81 namespace declarations and 100 using directives converted via sed,
plus two FQN-aliases (ChatTwoPartyFinderPayload in PayloadHandler.cs and
ModifierFlag in KeybindManager.cs) updated. Critical: Language.Designer.cs
and HellionStrings.Designer.cs ResourceManager string arguments updated
synchronously — these are runtime reflection lookups not caught by the
C# compiler.

Two intentional ChatTwo references remain: the legacy migration path
'ChatTwo.json' in Plugin.cs (still points to upstream Chat 2's config
file by design) and the InternalsVisibleTo declaration in
AssemblyInfo.cs (handled in the upcoming repo-folder rename task).

The local alias names 'ChatTwoPartyFinderPayload' and 'ChatTwoConflictDetector'
are preserved as local symbols; only their target namespaces and references
changed.

ChatTwo/GameFunctions/Chat.cs

@@ -1,8 +1,8 @@
 using System.Text;
-using ChatTwo.Code;
-using ChatTwo.GameFunctions.Types;
-using ChatTwo.Resources;
-using ChatTwo.Util;
+using HellionChat.Code;
+using HellionChat.GameFunctions.Types;
+using HellionChat.Resources;
+using HellionChat.Util;
 using Dalamud.Game.Config;
 using Dalamud.Game.Text.SeStringHandling;
 using Dalamud.Hooking;
@@ -22,7 +22,7 @@ using Lumina.Text.ReadOnly;
 
 using ValueType = FFXIVClientStructs.FFXIV.Component.GUI.AtkValueType;
 
-namespace ChatTwo.GameFunctions;
+namespace HellionChat.GameFunctions;
 
 internal sealed unsafe class Chat : IDisposable
 {

ChatTwo/GameFunctions/ChatBox.cs

@@ -1,10 +1,10 @@
 using System.Text;
-using ChatTwo.Resources;
+using HellionChat.Resources;
 using Dalamud.Memory;
 using FFXIVClientStructs.FFXIV.Client.System.String;
 using FFXIVClientStructs.FFXIV.Client.UI;
 
-namespace ChatTwo.GameFunctions;
+namespace HellionChat.GameFunctions;
 
 public unsafe class ChatBox
 {

ChatTwo/GameFunctions/Context.cs

@@ -1,9 +1,9 @@
-using ChatTwo.Util;
+using HellionChat.Util;
 using FFXIVClientStructs.FFXIV.Client.UI.Agent;
 using FFXIVClientStructs.FFXIV.Client.UI.Info;
 using FFXIVClientStructs.FFXIV.Client.UI.Misc;
 
-namespace ChatTwo.GameFunctions;
+namespace HellionChat.GameFunctions;
 
 internal sealed unsafe class Context
 {

ChatTwo/GameFunctions/GameFunctions.cs

@@ -16,7 +16,7 @@ using Lumina.Excel;
 using Lumina.Excel.Sheets;
 using ValueType = FFXIVClientStructs.FFXIV.Component.GUI.AtkValueType;
 
-namespace ChatTwo.GameFunctions;
+namespace HellionChat.GameFunctions;
 
 internal unsafe class GameFunctions : IDisposable
 {

ChatTwo/GameFunctions/KeybindManager.cs

@@ -1,16 +1,16 @@
 using System.Numerics;
-using ChatTwo.Code;
-using ChatTwo.GameFunctions.Types;
-using ChatTwo.Util;
+using HellionChat.Code;
+using HellionChat.GameFunctions.Types;
+using HellionChat.Util;
 using Dalamud.Game.ClientState.Keys;
 using Dalamud.Game.Config;
 using Dalamud.Plugin.Services;
 using FFXIVClientStructs.FFXIV.Client.System.String;
 using FFXIVClientStructs.FFXIV.Client.UI;
 using Dalamud.Bindings.ImGui;
-using ModifierFlag = ChatTwo.GameFunctions.Types.ModifierFlag;
+using ModifierFlag = HellionChat.GameFunctions.Types.ModifierFlag;
 
-namespace ChatTwo.GameFunctions;
+namespace HellionChat.GameFunctions;
 
 internal enum KeyboardSource {
     Game,

ChatTwo/GameFunctions/Party.cs

@@ -1,10 +1,10 @@
-using ChatTwo.Resources;
-using ChatTwo.Util;
+using HellionChat.Resources;
+using HellionChat.Util;
 using Dalamud.Interface.ImGuiNotification;
 using FFXIVClientStructs.FFXIV.Client.UI.Agent;
 using FFXIVClientStructs.FFXIV.Client.UI.Info;
 
-namespace ChatTwo.GameFunctions;
+namespace HellionChat.GameFunctions;
 
 internal static unsafe class Party
 {

ChatTwo/GameFunctions/Types/ChannelSwitchInfo.cs

@@ -1,6 +1,6 @@
-using ChatTwo.Code;
+using HellionChat.Code;
 
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 internal class ChannelSwitchInfo {
     internal InputChannel? Channel { get; }

ChatTwo/GameFunctions/Types/ChatActivatedArgs.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 internal sealed class ChatActivatedArgs
 {

ChatTwo/GameFunctions/Types/Keybind.cs

@@ -1,6 +1,6 @@
 using Dalamud.Game.ClientState.Keys;
 
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 internal class Keybind
 {

ChatTwo/GameFunctions/Types/ModifierFlag.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 [Flags]
 public enum ModifierFlag

ChatTwo/GameFunctions/Types/RotateMode.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 internal enum RotateMode
 {

ChatTwo/GameFunctions/Types/TellHistoryInfo.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 internal sealed class TellHistoryInfo
 {

ChatTwo/GameFunctions/Types/TellReason.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 public enum TellReason
 {

ChatTwo/GameFunctions/Types/TellTarget.cs

@@ -1,7 +1,7 @@
 using Dalamud.Game.ClientState.Objects.SubKinds;
 using FFXIVClientStructs.FFXIV.Client.Game.Character;
 
-namespace ChatTwo.GameFunctions.Types;
+namespace HellionChat.GameFunctions.Types;
 
 [Serializable]
 public class TellTarget