Use annotations and autoconfiguration

Use the `AsCommand` annotation to automatically register commands as
services and automatically add them to `./bin/console` instead of adding
them manually.

config/packages/routing.yaml

@@ -1,10 +0,0 @@
-framework:
-    router:
-        # Configure how to generate URLs in non-HTTP contexts, such as CLI commands.
-        # See https://symfony.com/doc/current/routing.html#generating-urls-in-commands
-        #default_uri: http://localhost
-
-when@prod:
-    framework:
-        router:
-            strict_requirements: null

config/routes.yaml

@@ -1,5 +0,0 @@
-controllers:
-    resource:
-        path: ../src/Controller/
-        namespace: App\Controller
-    type: attribute

config/routes/framework.yaml

@@ -1,4 +0,0 @@
-when@dev:
-    _errors:
-        resource: '@FrameworkBundle/Resources/config/routing/errors.xml'
-        prefix: /_error