text: Title: Add `create` method
  Body: If you want to create an object and save it, the current approach is:
  
  ```python
  band = Band(name="Pythonistas")
  await band.save().run()
  ```
  
  We can add a `create` method, which might be preferable for some people coming from other ORMs:
  
  ```python
  band = await Band.objects().create(name="Pythonistas").run()
  ```
  