build: rebuild artifacts and update CI workflows

build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     java
     id("xyz.jpenilla.run-paper") version "2.3.1"
+    jacoco
 }
 
 group = "com.loki"
@@ -46,6 +47,19 @@ tasks.test {
     useJUnitPlatform()
     maxParallelForks = Runtime.getRuntime().availableProcessors()
     setForkEvery(100)
+    finalizedBy(tasks.jacocoTestReport)
+}
+
+tasks.jacocoTestReport {
+    dependsOn(tasks.test)
+    reports {
+        xml.required.set(true)
+        html.required.set(true)
+    }
+}
+
+jacoco {
+    toolVersion = "0.8.11"
 }
 
 tasks.jar {