[DEV] Add pipeline script

Jenkinsfile

@@ -0,0 +1,32 @@
+pipeline {
+    stages {
+        stage("Build LTS Folders") {
+            steps {
+            script {
+              def subfolderNames = ["1.18.2", "1.19.2", "1.19.3", "1.20", "1.20.2", "1.20.4"]
+              boolean hasFailure = false
+
+              for (def subfolderName in subfolderNames) {
+                def subfolderPath = "${WORKSPACE}/${subfolderName}"
+
+                if (dir(subfolderPath).exists()) {
+                  try {
+                    def subfolderJob = load "${subfolderPath}/.jenkins/Jenkinsfile.snapshot"
+                    subfolderJob()
+                  } catch (Exception e) {
+                    echo "Error running pipeline for ${subfolderPath}: ${e.message}"
+                    hasFailure = true
+                  }
+                } else {
+                  echo "Skipping non-existent folder: ${subfolderPath}"
+                }
+              }
+
+              if (hasFailure) {
+                error "One or more subfolder pipelines failed."
+              }
+            }
+          }
+        }
+    }
+}