[#21] feat: buildSrc 적용

- gradle 설정 중 plugin 이름, 버전 관리용 object class 적용

build.gradle.kts

@@ -1,17 +1,11 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-}
-
 plugins {
-    id("org.springframework.boot") version "2.7.0"
-    id("io.spring.dependency-management") version "1.0.11.RELEASE"
-    kotlin("jvm") version "1.6.21"
-    kotlin("plugin.spring") version "1.6.21" apply false    // TODO: apply false what?
-    kotlin("plugin.jpa") version "1.6.21" apply false
+    id(Plugins.SPRING_BOOT) version Plugins.SPRING_BOOT_VERSION
+    id(Plugins.SPRING_DEPENDENCY_MANAGEMENT) version Plugins.SPRING_DEPENDENCY_MANAGEMENT_VERSION
+    kotlin(Plugins.Kotlin.JVM) version Plugins.Kotlin.VERSION
+    kotlin(Plugins.Kotlin.SPRING) version Plugins.Kotlin.VERSION apply false    // TODO: apply false what?
+    kotlin(Plugins.Kotlin.JPA) version Plugins.Kotlin.VERSION apply false
 }
 
 java.sourceCompatibility = JavaVersion.VERSION_17

buildSrc/build.gradle.kts

@@ -0,0 +1,7 @@
+repositories {
+    mavenCentral()
+}
+
+plugins {
+    `kotlin-dsl`
+}

buildSrc/src/main/kotlin/Plugins.kt

@@ -0,0 +1,15 @@
+object Plugins {
+    const val SPRING_BOOT_VERSION = "2.7.0"
+    const val SPRING_BOOT = "org.springframework.boot"
+
+    const val SPRING_DEPENDENCY_MANAGEMENT_VERSION = "1.0.11.RELEASE"
+    const val SPRING_DEPENDENCY_MANAGEMENT = "io.spring.dependency-management"
+
+    object Kotlin {
+        const val VERSION = "1.6.21"
+
+        const val JVM = "jvm"
+        const val SPRING = "plugin.spring"
+        const val JPA = "plugin.jpa"
+    }
+}