Doesn't Start on Python 3.10

### Describe the bug

`cd galley`
`pip install .`
`galley`

gets me

```
Traceback (most recent call last):
File "/opt/anaconda3/bin/galley", line 5, in
from galley.__main__ import main
File "/Users/johnzhou/galley/galley/__main__.py", line 9, in
from galley.view import MainWindow
File "/Users/johnzhou/galley/galley/view.py", line 7, in
from queue import Query, Empty
ImportError: cannot import name 'Query' from 'queue' (/opt/anaconda3/lib/python3.10/queue.py)
```

### Steps to reproduce

See above

### Expected behavior

Starts

### Screenshots

_No response_

### Environment

- Operating System:
- Python version:
- Software versions:
- Briefcase:
- Toga:
- ...

### Logs

```

```

### Additional context

_No response_

Start in galley/view.py, where the traceback shows the failing import, and inspect how the project’s Query and Empty names are expected to be provided. Reproduce the documented installation and galley command under Python 3.10. Done means the application starts without this ImportError.

Written by the indexing model from the issue text.