add some IO commands

incomplete, need seek, readline, close, and write, (maybe tell?)

Author: dragoncoder047

.vscode/settings.json

@@ -3,6 +3,7 @@
         "cogni"
     ],
     "files.associations": {
-        "prelude.inc": "c"
+        "prelude.inc": "c",
+        "prelude2.inc": "c"
     }
 }