Add initial Jenkinsfile to aid with CI setup

Jenkinsfile

@@ -0,0 +1,82 @@
+@Library('jenkins-shared-libraries') _
+def ENV_LOC=[:]
+pipeline {
+    parameters {
+        choice(name: 'PLATFORM_FILTER', choices: ['all', 'windows-java-samples', 'mac-arm-java-samples', 'linux-java-samples'], description: 'Run on specific platform')
+        booleanParam defaultValue: false, description: 'Completely clean the workspace before building, including the Conan cache', name: 'CLEAN_WORKSPACE'
+        booleanParam defaultValue: false, description: 'Run clean-samples', name: 'DISTCLEAN'
+    }
+    options{
+        buildDiscarder logRotator(artifactDaysToKeepStr: '4', artifactNumToKeepStr: '10', daysToKeepStr: '7', numToKeepStr: '10')
+        disableConcurrentBuilds()
+        timeout(time: 4, unit: "HOURS")
+    }
+    agent none
+    triggers {
+        // From the doc: @midnight actually means some time between 12:00 AM and 2:59 AM.
+        // This gives us automatic spreading out of jobs, so they don't cause load spikes.
+        cron('@midnight')
+    }
+    stages {
+        stage('Matrix stage') {
+            matrix {
+                agent {
+                    label "${NODE}"
+                }
+                when { anyOf {
+                    expression { params.PLATFORM_FILTER == 'all' }
+                    expression { params.PLATFORM_FILTER == env.NODE }
+                } }
+                axes {
+                    axis {
+                        name 'NODE'
+                        values 'windows-java-samples', 'mac-arm-java-samples', 'linux-java-samples'
+                    }
+                }
+                environment {
+                    CONAN_USER_HOME = "${WORKSPACE}"
+                    CONAN_NON_INTERACTIVE = '1'
+                    CONAN_PRINT_RUN_COMMANDS = '1'
+                }
+                stages {
+                    stage('Axis'){
+                        steps {
+                            printPlatformNameInStep()
+                        }
+                    }
+                    stage('Clean/reset Git checkout for release') {
+                        when {
+                            expression {
+                                params.CLEAN_WORKSPACE
+                            }
+                        }
+                        steps {
+                            echo "Clean ${NODE}"
+                            script {
+                                // Ensure that the checkout is clean and any changes
+                                // to .gitattributes and .gitignore have been taken
+                                // into effect
+                                if (isUnix()) {
+                                    sh """
+                                          git rm -f -q -r .
+                                          git reset --hard HEAD
+                                          git clean -fdx
+                                    """
+                                } else {
+                                    // On Windows, 'git clean' can't handle long paths in .conan,
+                                    // so remove that first.
+                                    bat """
+                                          if exist ${WORKSPACE}\\.conan\\ rmdir/s/q ${WORKSPACE}\\.conan
+                                          git rm -q -r .
+                                          git reset --hard HEAD
+                                          git clean -fdx
+                                    """
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}