chore: add jacoco test report

build.gradle

@@ -2,6 +2,7 @@ import com.github.spotbugs.snom.Confidence
 
 plugins {
     id 'java'
+    id 'jacoco'
     id 'maven-publish'
     id 'signing'
     alias libs.plugins.spotbugs
@@ -114,3 +115,11 @@ spotless {
         removeUnusedImports()
     }
 }
+
+tasks.jacocoTestReport {
+    dependsOn(tasks.test)
+    group = 'verification'
+    reports {
+        html.required = true
+    }
+}