update readmes

ResenderBot/native_launcher/src/nativeMain/kotlin/ResenderBot.kt

@@ -1,5 +1,9 @@
 import kotlinx.coroutines.runBlocking
 
+/**
+ * Starts the native resender launcher with the first element of [args] as its bot
+ * token. Later elements are ignored.
+ */
 fun main(vararg args: String) {
     runBlocking {
         activateResenderBot(args.first()) {