Adds testcase for PR policy checks

Jenkinsfile

@@ -1,23 +1,59 @@
 pipeline {
-  agent any
+  agent {
+    dockerfile {
+      filename 'Dockerfile.ci'
+      reuseNode true
+    }
+  }
+
+  options {
+    skipDefaultCheckout()
+    timestamps()
+    disableConcurrentBuilds()
+  }
+
+  environment {
+    BUILD_DIR = "build"
+    CHANGE_TARGET = "${env.CHANGE_TARGET ?: 'origin/main'}"
+  }
 
   stages {
     stage('Checkout') {
       steps {
         checkout scm
+        sh 'git fetch --all --prune'
+        sh 'git submodule update --init --recursive || true'
+      }
+    }
+
+    stage('Policy Checks') {
+      steps {
+        sh 'python3 ci/check_pr_policies.py'
+      }
+    }
+
+    stage('Configure') {
+      steps {
+        sh 'cmake -S . -B ${BUILD_DIR} -G Ninja -DCMAKE_BUILD_TYPE=Debug'
       }
     }
 
     stage('Build') {
       steps {
-        sh 'echo Build works'
+        sh 'cmake --build ${BUILD_DIR} --parallel'
       }
     }
 
     stage('Test') {
       steps {
-        sh 'echo Tests work'
+        sh 'ctest --test-dir ${BUILD_DIR} --output-on-failure'
       }
     }
   }
+
+  post {
+    always {
+      cleanWs deleteDirs: true, disableDeferredWipeout: true
+    }
+  }
 }