rewrite: Initial rewrite skeleton.

Remove modules that will no longer be required.
Move pending modules to pending-rewrite folders.

bot/modules/pending-rewrite/accountability/lib.py

@@ -0,0 +1,8 @@
+import datetime
+
+
+def utc_now():
+    """
+    Return the current timezone-aware utc timestamp.
+    """
+    return datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc)