Add Jenkins pipeline for build and deployment

Jenkinsfile

@@ -0,0 +1,37 @@
+pipeline {
+    agent any
+
+    stages {
+        stage('Info') {
+            steps {
+                echo "Branch: ${env.BRANCH_NAME}"
+                echo "PR ID: ${env.CHANGE_ID}"
+                echo "Target: ${env.CHANGE_TARGET}"
+            }
+        }
+
+        stage('Build') {
+            steps {
+                sh 'echo "Building..."'
+            }
+        }
+
+        stage('Test') {
+            steps {
+                sh 'echo "Running tests..."'
+            }
+        }
+
+        stage('Deploy') {
+            when {
+                expression {
+                    env.CHANGE_ID == null && 
+                    (env.BRANCH_NAME == 'main' || env.BRANCH_NAME == 'master')
+                }
+            }
+            steps {
+                echo "🚀 Deploying from ${env.BRANCH_NAME}"
+            }
+        }
+    }
+}