[V3 Setup] Overhaul backend conversion process through setup scripts (#2579)

* swap to click for setup

* Initial changes

* expose some stuff to allow for per-driver optimizations

* overwrite base config

* add red log

* add one print juuuust in case

* fix this

* thanks kowlin

* damn

* oops

* fix thing

* partial commit

* Working mongo -> json conversion, it sucks tho

* remove unused line

* Wrote initial optimized json importer

* optimized json importer

* remove useless line

* update mongo to json converter

* lets try writing the correct entry

* oops

* style fix

* add some garbage data filters going from old mongo to json

* ignore garbage data in mongov2 conversions

* simplify code a bit and add a completion message

* missed one

* Update pipfile lock

* Lock click version

redbot/core/drivers/red_mongo.py

@@ -49,6 +49,10 @@ class Mongo(BaseDriver):
         if _conn is None:
             _initialize(**kwargs)
 
+    async def has_valid_connection(self) -> bool:
+        # Maybe fix this?
+        return True
+
     @property
     def db(self) -> motor.core.Database:
         """