chore: restructuring

mock_exam/app/build.gradle

@@ -1,49 +0,0 @@
-/*
- * This file was generated by the Gradle 'init' task.
- *
- * This generated file contains a sample Java application project to get you started.
- * For more details on building Java & JVM projects, please refer to https://docs.gradle.org/8.14.3/userguide/building_java_projects.html in the Gradle documentation.
- */
-
-plugins {
-    // Apply the application plugin to add support for building a CLI application in Java.
-    id 'application'
-}
-
-repositories {
-    // Use Maven Central for resolving dependencies.
-    mavenCentral()
-}
-
-dependencies {
-    // Use JUnit Jupiter for testing.
-    testImplementation libs.junit.jupiter
-
-    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
-
-    // This dependency is used by the application.
-    implementation libs.guava
-}
-
-// Apply a specific Java toolchain to ease working on different environments.
-java {
-    toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
-    }
-}
-
-application {
-    // Define the main class for the application.
-    mainClass = 'org.example.App'
-}
-
-tasks.named('test') {
-    // Use JUnit Platform for unit tests.
-    useJUnitPlatform()
-}
-
-jar {
-  manifest {
-   attributes 'Main-Class': 'org.example.App'
-  }
-}