feat: LoHub Action system + Join system implementation

lohub/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    java
+}
+
+repositories {
+    mavenCentral()
+    maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo.extendedclip.com/content/repositories/placeholderapi/")
+    maven("https://maven.enginehub.org/repo/")
+}
+
+dependencies {
+    compileOnly("io.papermc.paper:paper-api:1.20.1-R0.1-SNAPSHOT")
+    compileOnly("me.clip:placeholderapi:2.11.6")
+    compileOnly("com.sk89q.worldguard:worldguard-bukkit:7.0.9")
+    implementation("com.google.code.gson:gson:2.10.1")
+    
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.10.0")
+    testImplementation("org.junit.jupiter:junit-jupiter-engine:5.10.0")
+    testImplementation("org.mockito:mockito-core:5.11.0")
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher:1.10.0")
+}
+
+tasks.jar {
+    archiveFileName.set("LoHub-1.5.5-1.20.1.jar")
+    from(configurations.runtimeClasspath.get().map { if (it.isDirectory) it else zipTree(it) })
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}