feat: NCS-37 add backcore Quarkus module skeleton

Introduces the backcore Quarkus REST module with build configuration,
application.yml, and a smoke test confirming Quarkus boots successfully.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

gradle.properties

@@ -0,0 +1,5 @@
+quarkusPluginId=io.quarkus
+quarkusPluginVersion=3.32.4
+quarkusPlatformGroupId=io.quarkus.platform
+quarkusPlatformArtifactId=quarkus-bom
+quarkusPlatformVersion=3.32.4

modules/backcore/build.gradle.kts

@@ -0,0 +1,88 @@
+plugins {
+    id("scala")
+    id("org.scoverage") version "8.1"
+    id("io.quarkus")
+}
+
+@Suppress("UNCHECKED_CAST")
+val versions = rootProject.extra["VERSIONS"] as Map<String, String>
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+scala {
+    scalaVersion = versions["SCALA3"]!!
+}
+
+scoverage {
+    scoverageVersion.set(versions["SCOVERAGE"]!!)
+}
+
+tasks.withType<ScalaCompile> {
+    scalaCompileOptions.additionalParameters = listOf("-encoding", "UTF-8")
+}
+
+val quarkusPlatformGroupId: String by project
+val quarkusPlatformArtifactId: String by project
+val quarkusPlatformVersion: String by project
+
+dependencies {
+    implementation(project(":modules:api"))
+    implementation(project(":modules:core"))
+    implementation(project(":modules:io"))
+    implementation(project(":modules:rule"))
+
+    implementation(enforcedPlatform("${quarkusPlatformGroupId}:${quarkusPlatformArtifactId}:${quarkusPlatformVersion}"))
+    implementation("io.quarkus:quarkus-rest")
+    implementation("io.quarkus:quarkus-rest-jackson")
+    implementation("io.quarkus:quarkus-config-yaml")
+    implementation("io.quarkus:quarkus-arc")
+
+    implementation("com.fasterxml.jackson.module:jackson-module-scala_3:2.18.0")
+
+    testImplementation(platform("org.junit:junit-bom:5.13.4"))
+    testImplementation("org.junit.jupiter:junit-jupiter")
+    testImplementation("org.scalatest:scalatest_3:${versions["SCALATEST"]!!}")
+    testImplementation("co.helmethair:scalatest-junit-runner:${versions["SCALATEST_JUNIT"]!!}")
+    testImplementation("io.quarkus:quarkus-junit5")
+    testImplementation("io.rest-assured:rest-assured")
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+configurations.matching { !it.name.startsWith("scoverage") }.configureEach {
+    resolutionStrategy.force("org.scala-lang:scala-library:${versions["SCALA_LIBRARY"]!!}")
+}
+configurations.scoverage {
+    resolutionStrategy.eachDependency {
+        if (requested.group == "org.scoverage" && requested.name.startsWith("scalac-scoverage-plugin_")) {
+            useTarget("${requested.group}:scalac-scoverage-plugin_2.13.16:2.3.0")
+        }
+    }
+}
+
+group = "de.nowchess"
+version = "1.0-SNAPSHOT"
+
+tasks.withType<JavaCompile> {
+    options.encoding = "UTF-8"
+    options.compilerArgs.add("-parameters")
+}
+
+tasks.withType<Jar>().configureEach {
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}
+
+tasks.test {
+    useJUnitPlatform {
+        includeEngines("scalatest", "junit-jupiter")
+        testLogging {
+            events("passed", "skipped", "failed")
+        }
+    }
+    finalizedBy(tasks.reportScoverage)
+}
+tasks.reportScoverage {
+    dependsOn(tasks.test)
+}

modules/backcore/src/main/resources/application.yml

@@ -0,0 +1,3 @@
+quarkus:
+  http:
+    port: 8080

modules/backcore/src/test/scala/de/nowchess/backcore/BackcoreStartupTest.scala

@@ -0,0 +1,11 @@
+package de.nowchess.backcore
+
+import io.quarkus.test.junit.QuarkusTest
+import org.junit.jupiter.api.Test
+
+@QuarkusTest
+class BackcoreStartupTest:
+  @Test
+  def applicationStarts(): Unit =
+    // If we get here the Quarkus container started successfully
+    ()

settings.gradle.kts

@@ -1,8 +1,23 @@
 rootProject.name = "NowChessSystems"
+
+pluginManagement {
+    val quarkusPluginVersion: String by settings
+    val quarkusPluginId: String by settings
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+        mavenLocal()
+    }
+    plugins {
+        id(quarkusPluginId) version quarkusPluginVersion
+    }
+}
+
 include(
     "modules:core",
     "modules:api",
     "modules:io",
     "modules:rule",
     "modules:ui",
-)
+    "modules:backcore",
+)