Add directory check in WebsocketCommand and LanguageServerStartCommand for JDK 25 compatibility

Co-authored-by: nixel2007 <[email protected]>

Author: Copilot

src/main/java/com/github/_1c_syntax/bsl/languageserver/cli/LanguageServerStartCommand.java

@@ -75,7 +75,7 @@ public class LanguageServerStartCommand implements Callable<Integer> {
   public Integer call() {
 
     var configurationFile = new File(configurationOption);
-    if (configurationFile.exists()) {
+    if (configurationFile.exists() && !configurationFile.isDirectory()) {
       configuration.update(configurationFile);
     }
 

src/main/java/com/github/_1c_syntax/bsl/languageserver/cli/WebsocketCommand.java

@@ -87,7 +87,7 @@ public class WebsocketCommand implements Callable<Integer> {
 
   public Integer call() {
     var configurationFile = new File(configurationOption);
-    if (configurationFile.exists()) {
+    if (configurationFile.exists() && !configurationFile.isDirectory()) {
       configuration.update(configurationFile);
     }