Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

config/routes/annotations.yaml

@@ -0,0 +1,7 @@
+controllers:
+    resource: ../../src/Controller/
+    type: annotation
+
+kernel:
+    resource: ../../src/Kernel.php
+    type: annotation

config/routes/dev/framework.yaml

@@ -0,0 +1,3 @@
+_errors:
+    resource: '@FrameworkBundle/Resources/config/routing/errors.xml'
+    prefix: /_error

config/routes/dev/web_profiler.yaml

@@ -0,0 +1,7 @@
+web_profiler_wdt:
+    resource: '@WebProfilerBundle/Resources/config/routing/wdt.xml'
+    prefix: /_wdt
+
+web_profiler_profiler:
+    resource: '@WebProfilerBundle/Resources/config/routing/profiler.xml'
+    prefix: /_profiler

config/routes/fos_js_routing.yaml

@@ -0,0 +1,2 @@
+fos_js_routing:
+    resource: "@FOSJsRoutingBundle/Resources/config/routing/routing-sf4.xml"

config/routes/fos_oauth_server.yaml

@@ -0,0 +1,5 @@
+fos_oauth_server_token:
+    resource: "@FOSOAuthServerBundle/Resources/config/routing/token.xml"
+
+fos_oauth_server_authorize:
+    resource: "@FOSOAuthServerBundle/Resources/config/routing/authorize.xml"

config/routes/nelmio_api_doc.yaml

@@ -0,0 +1,12 @@
+# Expose your documentation as JSON swagger compliant
+app.swagger:
+    path: /api/doc.json
+    methods: GET
+    defaults: { _controller: nelmio_api_doc.controller.swagger }
+
+## Requires the Asset component and the Twig bundle
+## $ composer require twig asset
+#app.swagger_ui:
+#    path: /api/doc
+#    methods: GET
+#    defaults: { _controller: nelmio_api_doc.controller.swagger_ui }

config/routes/scheb_2fa.yaml

@@ -0,0 +1,7 @@
+2fa_login:
+    path: /2fa
+    defaults:
+        _controller: "scheb_two_factor.form_controller::form"
+
+2fa_login_check:
+    path: /2fa_check