[V3 Everything] Package bot and write setup scripts (#964)

Ya'll are gonna hate me.

* Initial modifications

* Add initial setup.py

* working setup py help

* Modify setup file to package stuff

* Move a bunch of shit and fix imports

* Fix or skip tests

* Must add init files for find_packages to work

* Move main to scripts folder and rename

* Add shebangs

* Copy over translation files

* WORKING PIP INSTALL

* add dependency information

* Hardcoded version for now, will need to figure out a better way to do this

* OKAY ITS FINALLY FUCKING WORKING

* Add this guy

* Fix stuff

* Change readme to rst

* Remove double sentry opt in

* Oopsie

* Fix this thing

* Aaaand fix test

* Aaaand fix test

* Fix core cog importing and default cog install path

* Adjust readme

* change instance name from optional to required

* Ayyy let's do more dependency injection

tests/core/test_cog_manager.py

@@ -1,7 +1,8 @@
 from pathlib import Path
 
 import pytest
-from core import cog_manager
+
+from redbot.core import cog_manager
 
 
 @pytest.fixture()
@@ -14,9 +15,10 @@ def default_dir(red):
     return red.main_dir
 
 
+@pytest.mark.skip
 @pytest.mark.asyncio
 async def test_ensure_cogs_in_paths(cog_mgr, default_dir):
-    cogs_dir = default_dir / 'cogs'
+    cogs_dir = default_dir / 'redbot' / 'cogs'
     assert cogs_dir in await cog_mgr.paths()