[Rubocop] Default to running with todo

These are only interesting in solargraph

.rubocop.yml

@@ -1,4 +1,4 @@
-<% if ENV["CI"] %>
+<% unless ENV["IGNORE_RUBOCOP_TODO"] %>
 inherit_from: .rubocop_todo.yml
 <% end %>
 

README.md

@@ -50,7 +50,7 @@ You're most likely using Windows. Give this a shot, it tells Git to stop trackin
 
 `docker compose run --rm tests` to execute the test suite.
 
-`docker compose run --rm rubocop` to run the linter. You will see a truckload of violations but CI will ignore these.
+`docker compose run --rm rubocop` to run the linter.
 
 The postgres server accepts outside connections which you can use to access it with a local client. Use `localhost:34517` to connect to a database named `e621_development` with the user `e621`. Leave the password blank, anything will work.
 

docker-compose.yml

@@ -147,6 +147,8 @@ services:
     working_dir: $PWD
     volumes:
       - .:$PWD
+    environment:
+      IGNORE_RUBOCOP_TODO: "1"
     ports:
       - 7658:7658
     profiles: