feat: add configurable hotkeys to cycle tabs

Adds two configurable hotkeys (plus the required code infrastructure to
handle configurable hotkeys) for cycling the active chat tab forward by
one and backwards by one.

ChatTwo/Configuration.cs

@@ -1,12 +1,33 @@
 using System.Collections;
 using ChatTwo.Code;
+using ChatTwo.GameFunctions.Types;
 using ChatTwo.Resources;
 using ChatTwo.Ui;
 using Dalamud.Configuration;
+using Dalamud.Game.ClientState.Keys;
 using ImGuiNET;
 
 namespace ChatTwo;
 
+[Serializable]
+internal class ConfigKeyBind
+{
+    public ModifierFlag Modifier;
+    public VirtualKey Key;
+
+    public override string ToString()
+    {
+        var modString = "";
+        if (Modifier.HasFlag(ModifierFlag.Ctrl))
+            modString += Language.Keybind_Modifier_Ctrl + " + ";
+        if (Modifier.HasFlag(ModifierFlag.Shift))
+            modString += Language.Keybind_Modifier_Shift + " + ";
+        if (Modifier.HasFlag(ModifierFlag.Alt))
+            modString += Language.Keybind_Modifier_Alt + " + ";
+        return modString+Key.GetFancyName();
+    }
+}
+
 [Serializable]
 internal class Configuration : IPluginConfiguration
 {
@@ -68,6 +89,9 @@ internal class Configuration : IPluginConfiguration
     public bool OverrideStyle;
     public string? ChosenStyle;
 
+    public ConfigKeyBind? ChatTabForward = null;
+    public ConfigKeyBind? ChatTabBackward = null;
+
     internal void UpdateFrom(Configuration other, bool backToOriginal)
     {
         if (backToOriginal)
@@ -123,6 +147,8 @@ internal class Configuration : IPluginConfiguration
         Tabs = other.Tabs.Select(t => t.Clone()).ToList();
         OverrideStyle = other.OverrideStyle;
         ChosenStyle = other.ChosenStyle;
+        ChatTabForward = other.ChatTabForward;
+        ChatTabBackward = other.ChatTabBackward;
     }
 }