add fat jar compile mode

src/main/kotlin/de/wulkanat/DataIO.kt

@@ -0,0 +1,20 @@
+package de.wulkanat
+
+import kotlinx.serialization.Serializable
+import java.io.File
+
+@Serializable
+data class DiscordChannel(
+    val id: Long,
+    val mentionedRole: String? = null
+)
+
+@Serializable
+data class AdminFile(
+    val adminId: Long,
+    val token: String,
+    val updateMs: Long
+)
+
+val SERVERS_FILE = File("servers.json")
+val ADMIN_FILE = File("admin.json")