Remove credo and use mix format, and lint everything

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/eventos/actors/bot.ex

@@ -6,12 +6,11 @@ defmodule Eventos.Actors.Bot do
   import Ecto.Changeset
   alias Eventos.Actors.{Actor, User, Bot}
 
-
   schema "bots" do
-    field :source, :string
-    field :type, :string, default: :ics
-    belongs_to :actor, Actor
-    belongs_to :user, User
+    field(:source, :string)
+    field(:type, :string, default: :ics)
+    belongs_to(:actor, Actor)
+    belongs_to(:user, User)
 
     timestamps()
   end