add Manager add/remove/list command, database tables.

build.gradle.kts

@@ -77,4 +77,8 @@ tasks.withType<Jar> {
     })
 
     duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}
+
+tasks.named<JavaExec>("run") {
+    systemProperty("logback.configurationFile", "logback-debug.xml")
 }