add contact form and mailing

Co-authored-by: Constantin Simonis <constantin@simonis.lol>
Reviewed-on: http://git.simonis.lol/sites/abiball/pulls/6
Reviewed-by: Constantin Simonis <constantin@simonis.lol>
Co-authored-by: Jan-Marlon Leibl <jleibl@proton.me>
Co-committed-by: Jan-Marlon Leibl <jleibl@proton.me>

config/packages/web_profiler.yaml

@@ -0,0 +1,17 @@
+when@dev:
+    web_profiler:
+        toolbar: true
+        intercept_redirects: false
+
+    framework:
+        profiler:
+            only_exceptions: false
+            collect_serializer_data: true
+
+when@test:
+    web_profiler:
+        toolbar: false
+        intercept_redirects: false
+
+    framework:
+        profiler: { collect: false }