Implemented basic shell command execution and result retrieval. Next Step: Remove completed tasks from queue

agents/monarch/commands/shell.nim

@@ -1,3 +1,10 @@
-import winim
+import winim, osproc, strutils
 
 import ../types
+
+proc executeShellCommand*(command: seq[string]): TaskResult = 
+
+    echo command.join(" ")
+    let (output, status) = execCmdEx(command.join(" ")) 
+    
+    return output