Server: convert Gradle build script to Kotlin

As of Gradle 8.2, the Kotlin DSL is the default for new Gradle builds
and recommended by Gradle, so it makes sense to convert to this format.
In general, Kotlin offers more type safety and is more readable than the
previous Groovy syntax.

server/build.gradle.kts

@@ -0,0 +1,50 @@
+group = "xyz.laane"
+version = "1.0.0"
+
+plugins {
+    java
+    id("org.springframework.boot") version "3.1.4"
+    id("io.spring.dependency-management") version "1.1.3"
+    id("com.gorylenko.gradle-git-properties") version "2.4.1"  // Used by Sentry to match errors to specific git commit
+    id("io.freefair.lombok") version "8.4" // Lombok 1.18.30
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-web")
+
+    implementation("org.mariadb.jdbc:mariadb-java-client:3.2.0")
+    implementation("org.flywaydb:flyway-core:9.22.3")
+    implementation("org.flywaydb:flyway-mysql:9.22.3")
+
+    implementation("org.jsoup:jsoup:1.16.2")
+
+    implementation("io.sentry:sentry-spring-boot-starter-jakarta:6.32.0")
+    implementation("io.sentry:sentry-logback:6.32.0")
+}
+
+tasks.wrapper {
+    // by default the Gradle wrapper includes only compiled output
+    // this changes it to include sources and docs
+    distributionType = Wrapper.DistributionType.ALL
+}
+
+tasks.jar {
+    // the Spring Boot plugin already generates an executable jar as part of the bootJar task so no need for "jar" task
+    // https://docs.spring.io/spring-boot/docs/current/gradle-plugin/reference/htmlsingle/#packaging-executable.and-plain-archives
+    enabled = false
+}
+
+val springProfile = "default"
+
+tasks.bootRun {
+    args = listOf("--spring.profiles.active=" + springProfile)
+}