Rework module system. Now modules/commands are defined in a single file each, with both the function executed by teh agent and the definition for server-side argument parsing.

src/server/main.nim

@@ -1,6 +1,7 @@
 import core/server
-import strutils
+import ../modules/manager
 
 # Conquest framework entry point
 when isMainModule:
+    loadModules()
     startServer()