add jenkins script (#77307)

Jenkinsfile

@@ -0,0 +1,38 @@
+@Library('eo-jenkins-lib@main') import eo.Utils
+
+pipeline {
+    agent any
+    options { disableConcurrentBuilds() }
+    stages {
+        stage('Packaging') {
+            steps {
+                script {
+                    env.SHORT_JOB_NAME=sh(
+                        returnStdout: true,
+                        // given JOB_NAME=gitea/project/PR-46, returns project
+                        // given JOB_NAME=project/main, returns project
+                        script: '''
+                            echo "${JOB_NAME}" | sed "s/gitea\\///" | awk -F/ '{print $1}'
+                        '''
+                    ).trim()
+                    if (env.GIT_BRANCH == 'main' || env.GIT_BRANCH == 'origin/main') {
+                        sh "sudo -H -u eobuilder /usr/local/bin/eobuilder -d bullseye ${SHORT_JOB_NAME}"
+                    } else if (env.GIT_BRANCH.startsWith('hotfix/')) {
+                        sh "sudo -H -u eobuilder /usr/local/bin/eobuilder -d bullseye --branch ${env.GIT_BRANCH} --hotfix ${SHORT_JOB_NAME}"
+                    }
+                }
+            }
+        }
+    }
+    post {
+        always {
+            script {
+                utils = new Utils()
+                utils.mail_notify(currentBuild, env, 'ci+jenkins-gitea-eo-custom@entrouvert.org')
+            }
+        }
+        success {
+            cleanWs()
+        }
+    }
+}