Implemented sleep command to update sleep delay on agent

agents/monarch/commands/sleep.nim

@@ -0,0 +1,14 @@
+import os, strutils, strformat
+
+import ../types
+
+proc taskSleep*(delay: int): tuple[output: TaskResult, status: TaskStatus] = 
+
+    echo fmt"Sleeping for {$delay} seconds."
+
+    try: 
+        sleep(delay * 1000) 
+        return ("\n", Completed) 
+
+    except CatchableError as err: 
+        return (fmt"An error occured: {err.msg}" & "\n", Failed)