Premier commit (ajout de webpack, bootstrap et jquery)

.gitignore

.idea/.gitignore

.idea/modules.xml

.idea/symfony2.xml

.idea/symfonyProject.iml

.idea/vcs.xml

assets/app.js

assets/bootstrap.js

assets/controllers.json

assets/controllers/hello_controller.js

assets/styles/app.css

composer.json

composer.lock

config/bundles.php

config/packages/webpack_encore.yaml

package-lock.json

package.json

symfony.lock

webpack.config.js