added Stage to build Littlefs

Jenkinsfile

@@ -52,6 +52,16 @@ wifi_ap_password = DummyAP
             }
         }
 
+        stage('📁 Build Filesystem (LittleFS)') {
+            steps {
+                dir('Software') {
+                    sh """
+                        ${env.VENV_PATH}/bin/platformio run -t buildfs -e ${params.BUILD_ENV}
+                    """
+                }
+            }
+        }
+
         stage('📦 Find & Archive Firmware') {
             steps {
                 dir('Software') {