chore: tidy-up, move files shared between dalamud and injector into separate assembly

Dalamud.Common/ClientLanguage.cs

@@ -0,0 +1,27 @@
+namespace Dalamud.Common;
+
+/// <summary>
+/// Enum describing the language the game loads in.
+/// </summary>
+public enum ClientLanguage
+{
+    /// <summary>
+    /// Indicating a Japanese game client.
+    /// </summary>
+    Japanese,
+
+    /// <summary>
+    /// Indicating an English game client.
+    /// </summary>
+    English,
+
+    /// <summary>
+    /// Indicating a German game client.
+    /// </summary>
+    German,
+
+    /// <summary>
+    /// Indicating a French game client.
+    /// </summary>
+    French,
+}