pyglet from venv problem with __file__

## Test script (from https://pyglet.readthedocs.io/en/latest/programming_guide/quickstart.html)
## script (__main__.py in helper module)
```
import pyglet

window = pyglet.window.Window()
image = pyglet.resource.image('kitten.png')

@window.event
def on_draw():
window.clear()
image.blit(0, 0)

pyglet.app.run()
```

## Error output

```
Traceback (most recent call last):
File "pyglet", line 353, in __getattr__
AttributeError: 'NoneType' object has no attribute 'Window'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "pyglet", line 353, in __getattr__
AttributeError: 'NoneType' object has no attribute 'get_default'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "pyglet", line 353, in __getattr__
AttributeError: 'NoneType' object has no attribute 'get_script_home'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "helper.__main__", line 3, in
File "pyglet", line 359, in __getattr__
File "pyglet.window", line 1877, in
File "pyglet.window.win32", line 60, in
File "pyglet.canvas", line 64, in
File "pyglet.app", line 165, in
File "pyglet.app.base", line 152, in __init__
File "pyglet", line 359, in __getattr__
File "pyglet.clock", line 125, in
File "pyglet.lib", line 60, in
File "pyglet", line 359, in __getattr__
File "pyglet.resource", line 798, in
File "pyglet.resource", line 329, in __init__
File "pyglet.resource", line 145, in get_script_home
File "ntpath", line 526, in abspath
TypeError: _getfullpathname: path should be string, bytes or os.PathLike, not NoneType
SystemError
error: cargo run failed
```
## NOTES:
- this seems connected to calls like `path = os.path.dirname(os.path.abspath(main.__file__))`

Start by reproducing the quickstart script in __main__.py through the reported venv and cargo run path, then trace the __file__ handling around os.path.abspath and pyglet.resource.get_script_home. Done means the script can create its window and load kitten.png without the NoneType path error.

Written by the indexing model from the issue text.