Add webapp packages

.env

.env.test

.gitignore

assets/app.js

assets/bootstrap.js

assets/controllers.json

assets/controllers/hello_controller.js

assets/styles/app.css

bin/phpunit

compose.override.yaml

compose.yaml

composer.json

composer.lock

config/bundles.php

config/packages/asset_mapper.yaml

config/packages/debug.yaml

config/packages/doctrine.yaml

config/packages/doctrine_migrations.yaml

config/packages/mailer.yaml

config/packages/messenger.yaml