Add CRUD for site credentials

src/Wallabag/CoreBundle/Resources/translations/messages.en.yml

@@ -519,6 +519,26 @@ user:
     search:
         placeholder: Filter by username or email
 
+site_credential:
+    page_title: Site credentials management
+    new_site_credential: Create a credential
+    edit_site_credential: Edit an existing credential
+    description: "Here you can manage all credentials for sites which required them (create, edit and delete), like a paywall, an authentication, etc."
+    list:
+        actions: Actions
+        edit_action: Edit
+        yes: Yes
+        no: No
+        create_new_one: Create a new credential
+    form:
+        username_label: 'Username'
+        host_label: 'Host'
+        password_label: 'Password'
+        save: Save
+        delete: Delete
+        delete_confirm: Are you sure?
+        back_to_list: Back to list
+
 error:
     page_title: An error occurred
 
@@ -571,3 +591,8 @@ flashes:
             added: 'User "%username%" added'
             updated: 'User "%username%" updated'
             deleted: 'User "%username%" deleted'
+    site_credential:
+        notice:
+            added: 'Site credential for "%host%" added'
+            updated: 'Site credential for "%host%" updated'
+            deleted: 'Site credential for "%host%" deleted'