switch build system to gradle

gradle/libs.versions.toml

@@ -0,0 +1,18 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format
+
+[versions]
+com-mysql-mysql-connector-j = "9.4.0"
+org-springframework-boot-spring-boot-starter-actuator = "4.0.0-M3"
+org-springframework-boot-spring-boot-starter-data-jpa = "4.0.0-M3"
+org-springframework-boot-spring-boot-starter-test = "4.0.0-M3"
+org-springframework-boot-spring-boot-starter-websocket = "4.0.0-M3"
+org-springframework-security-spring-security-test = "7.0.0-M3"
+
+[libraries]
+com-mysql-mysql-connector-j = { module = "com.mysql:mysql-connector-j", version.ref = "com-mysql-mysql-connector-j" }
+org-springframework-boot-spring-boot-starter-actuator = { module = "org.springframework.boot:spring-boot-starter-actuator", version.ref = "org-springframework-boot-spring-boot-starter-actuator" }
+org-springframework-boot-spring-boot-starter-data-jpa = { module = "org.springframework.boot:spring-boot-starter-data-jpa", version.ref = "org-springframework-boot-spring-boot-starter-data-jpa" }
+org-springframework-boot-spring-boot-starter-test = { module = "org.springframework.boot:spring-boot-starter-test", version.ref = "org-springframework-boot-spring-boot-starter-test" }
+org-springframework-boot-spring-boot-starter-websocket = { module = "org.springframework.boot:spring-boot-starter-websocket", version.ref = "org-springframework-boot-spring-boot-starter-websocket" }
+org-springframework-security-spring-security-test = { module = "org.springframework.security:spring-security-test", version.ref = "org-springframework-security-spring-security-test" }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists