rewrite: Initial rewrite skeleton.

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

bot/modules/pending-rewrite/__init__.py

@@ -0,0 +1,16 @@
+from .sysadmin import *
+from .guild_admin import *
+from .meta import *
+from .economy import *
+from .study import *
+from .stats import *
+from .user_config import *
+from .workout import *
+from .todo import *
+from .topgg import *
+from .reminders import *
+from .renting import *
+from .moderation import *
+from .accountability import *
+from .plugins import *
+from .sponsors import *