Added DeepL action setting

I18N Commander/DataModel/Database/SettingDeepLAction.cs

@@ -0,0 +1,7 @@
+namespace DataModel.Database;
+
+public enum SettingDeepLAction
+{
+    MANUAL,
+    AUTOMATIC_ALL,
+}

I18N Commander/DataModel/Database/SettingNames.cs

@@ -2,6 +2,7 @@
 
 public static class SettingNames
 {
+    public static readonly string DEEPL_ACTION = "DeepL Action";
     public static readonly string DEEPL_API_KEY = "DeepL API Key";
     public static readonly string DEEPL_MODE = "DeepL Mode";
 }