feat: initialize Gradle multi-module backend and Vite frontend

backend/gradle/libs.versions.toml

@@ -0,0 +1,17 @@
+[versions]
+kotlin = "2.4.10"
+springBoot = "4.1.0"
+springCloud = "2025.1.2"
+
+[libraries]
+spring-boot-starter-web = { module = "org.springframework.boot:spring-boot-starter-web" }
+spring-boot-starter-cloud-gateway = { module = "org.springframework.cloud:spring-cloud-starter-gateway-server-webflux" }
+spring-boot-starter-webflux = { module = "org.springframework.boot:spring-boot-starter-webflux" }
+spring-boot-starter-data-jpa = { module = "org.springframework.boot:spring-boot-starter-data-jpa" }
+spring-boot-starter-kafka = { module = "org.springframework.boot:spring-boot-starter-kafka" }
+
+[plugins]
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+kotlin-spring = { id = "org.jetbrains.kotlin.plugin.spring", version.ref = "kotlin" }
+spring-boot = { id = "org.springframework.boot", version.ref = "springBoot" }
+dependency-management = { id = "io.spring.dependency-management", version = "1.1.7" }

backend/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,9 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.0-bin.zip
+networkTimeout=10000
+retries=0
+retryBackOffMs=500
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists