CheckoutBundle registration added
CheckoutBundle added.
Entities generated
OrderProduct renamed to PurchaseProduct
PurchaseController with crud added
views for Purchase added
Product bundle
delivery bundle skeleton with base admin cruds created
Merge remote-tracking branch 'origin/feature/checkout-bundle'

Conflicts:
	backend/app/AppKernel.php
Merge remote-tracking branch 'origin/belyakovskiy_product'
Merged with fixes
Merge remote-tracking branch 'origin/delivery-bundle'

Conflicts:
	backend/app/AppKernel.php
Merge with delivery