Target playset selection (#2892) #minor

<img width="667" height="637" alt="obraz"
src="https://github.com/user-attachments/assets/959b4f22-c300-4ede-b619-3e89bb0fa521"
/>

Author: IhateTrains

ImperatorToCK3/Configuration.cs

@@ -70,6 +70,7 @@ private void RegisterKeys(Parser parser) {
 		parser.RegisterKeyword("CK3directory", reader => CK3Path = reader.GetString());
 		parser.RegisterKeyword("targetGameModPath", reader => CK3ModsPath = reader.GetString());
 		parser.RegisterKeyword("selectedMods", reader => {
+			SelectedCK3Mods.Clear();
 			SelectedCK3Mods.UnionWith(reader.GetStrings());
 			Logger.Info($"{SelectedCK3Mods.Count} mods selected by configuration.");
 		});

ImperatorToCK3/Data_Files/fronter_configuration/fronter-configuration.txt

@@ -15,6 +15,8 @@ converterReleaseForumThread = "https://forum.paradoxplaza.com/forum/threads/impe
 pagesCommitIdUrl = "https://paradoxgameconverters.com/commit_ids/ImperatorToCK3.txt"
 
 autoGenerateModsFrom = targetGameModPath
+targetPlaysetSelectionEnabled = true
+
 progressOnCopyingComplete = 100 # Final progressbar value after completion of mod copying.
 
 requiredFolder = {