Bulk removal of projects and tasks imported from Asana

Please add a way to bulk-delete projects and tasks imported from integrations such as Asana.

Currently, disconnecting Asana leaves all previously imported projects and tasks in Rize, and they appear to be removable only one by one.

Ideally, Rize should support either:

- bulk selection and deletion of projects/tasks, or

- an option to remove all data imported from a disconnected integration.