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/Util/AutoTranslate.cs

@@ -12,7 +12,7 @@ using Pidgin;
 using static Pidgin.Parser;
 using static Pidgin.Parser<char>;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal static class AutoTranslate
 {

ChatTwo/Util/ChunkUtil.cs

@@ -1,4 +1,4 @@
-using ChatTwo.Code;
+using HellionChat.Code;
 using Dalamud.Game.Text.SeStringHandling;
 using Dalamud.Game.Text.SeStringHandling.Payloads;
 using System.Text;
@@ -6,7 +6,7 @@ using Lumina.Text.Payloads;
 
 using PayloadType = Dalamud.Game.Text.SeStringHandling.PayloadType;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal static class ChunkUtil
 {

ChatTwo/Util/ColourUtil.cs

@@ -1,7 +1,7 @@
 using System.Buffers.Binary;
 using System.Numerics;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal static class ColourUtil {
     private static (byte r, byte g, byte b) RgbaToRgbComponents(uint rgba)

ChatTwo/Util/DatePicker.cs

@@ -1,6 +1,6 @@
 using System.Globalization;
 using System.Numerics;
-using ChatTwo.Resources;
+using HellionChat.Resources;
 using Dalamud.Interface;
 using Dalamud.Interface.Colors;
 using Dalamud.Interface.ImGuiNotification;
@@ -9,7 +9,7 @@ using Dalamud.Interface.Utility.Raii;
 using Dalamud.Utility;
 using Dalamud.Bindings.ImGui;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 // From https://github.com/Flix01/imgui/blob/imgui_with_addons/addons/imguidatechooser/imguidatechooser.cpp
 public static class DateWidget

ChatTwo/Util/ExtraPayload.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 public class ColorPayload
 {

ChatTwo/Util/GlobalParametersCache.cs

@@ -2,7 +2,7 @@
 using FFXIVClientStructs.FFXIV.Client.UI.Misc;
 using FFXIVClientStructs.FFXIV.Component.Text;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 public static class GlobalParametersCache
 {

ChatTwo/Util/IconUtil.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 // From Kizer: https://github.com/Soreepeong/Dalamud/blob/feature/log-wordwrap/Dalamud/Interface/Spannables/Internal/GfdFileView.cs
 public readonly unsafe ref struct GfdFileView

ChatTwo/Util/ImGuiUtil.cs

@@ -1,9 +1,9 @@
 using System.Buffers;
 using System.Numerics;
 using System.Text;
-using ChatTwo.Code;
-using ChatTwo.GameFunctions.Types;
-using ChatTwo.Resources;
+using HellionChat.Code;
+using HellionChat.GameFunctions.Types;
+using HellionChat.Resources;
 using Dalamud.Game.ClientState.Keys;
 using Dalamud.Game.Text.SeStringHandling;
 using Dalamud.Interface;
@@ -15,7 +15,7 @@ using Dalamud.Interface.Utility;
 using Dalamud.Interface.Utility.Raii;
 using Dalamud.Bindings.ImGui;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal static class ImGuiUtil
 {

ChatTwo/Util/Lender.cs

@@ -1,4 +1,4 @@
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal class Lender<T>
 {

ChatTwo/Util/MathUtil.cs

@@ -1,6 +1,6 @@
 using System.Numerics;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 public static class MathUtil
 {

ChatTwo/Util/MemoryUtil.cs

@@ -1,6 +1,6 @@
 using System.Text;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 public static class MemoryUtil
 {

ChatTwo/Util/Payloads.cs

@@ -1,6 +1,6 @@
 using Dalamud.Game.Text.SeStringHandling;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal class PartyFinderPayload : Payload
 {

ChatTwo/Util/SearchSelector.cs

@@ -4,7 +4,7 @@ using Dalamud.Bindings.ImGui;
 using System.Collections;
 using Dalamud.Interface.Utility.Raii;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 // Modified from: https://github.com/UnknownX7/Hypostasis/blob/master/ImGui/ExcelSheet.cs
 public static class SearchSelector

ChatTwo/Util/StringUtil.cs

@@ -1,6 +1,6 @@
 using System.Text;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 internal static class StringUtil
 {

ChatTwo/Util/TabsUtil.cs

@@ -1,7 +1,7 @@
-using ChatTwo.Code;
-using ChatTwo.Resources;
+using HellionChat.Code;
+using HellionChat.Resources;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 public static class TabsUtil
 {

ChatTwo/Util/Tokenizer.cs

@@ -1,6 +1,6 @@
 using System.Text.RegularExpressions;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 // Modified from: https://jack-vanlightly.com/blog/2016/2/24/a-more-efficient-regex-tokenizer
 public static class Tokenizer

ChatTwo/Util/WrapperUtil.cs

@@ -1,7 +1,7 @@
-using ChatTwo.Resources;
+using HellionChat.Resources;
 using Dalamud.Interface.ImGuiNotification;
 
-namespace ChatTwo.Util;
+namespace HellionChat.Util;
 
 public static class WrapperUtil
 {