update readmes

RandomFileSenderBot/src/nativeMain/kotlin/ActualPickFile.kt

@@ -1,6 +1,7 @@
 import dev.inmo.micro_utils.common.MPPFile
 import okio.FileSystem
 
+/** Native picker backed by Okio, returning a file root directly or descending through random directory children. */
 actual fun pickFile(currentRoot: MPPFile): MPPFile? {
     if (FileSystem.SYSTEM.exists(currentRoot) && FileSystem.SYSTEM.listOrNull(currentRoot) == null) {
         return currentRoot

RandomFileSenderBot/src/nativeMain/kotlin/RandomFileSenderBot.kt

@@ -1,6 +1,7 @@
 import kotlinx.coroutines.runBlocking
 import okio.Path.Companion.toPath
 
+/** Kotlin/Native entry point; [args] contains the bot token followed by an optional picker root. */
 fun main(args: Array<String>) {
     runBlocking {
         doRandomFileSenderBot(args.first(), args.getOrNull(1) ?.toPath() ?: "".toPath())