Installing rye breaks the Windows launcher shebang support

[pfmoore]

Steps to Reproduce

❯ type .\example.py
#!/usr/bin/env python
import sys

print(sys.executable)
❯ py example.py
C:\Users\Gustav\AppData\Local\Programs\Python\Python312\python.exe
❯ .\rye-x86_64-windows.exe
Welcome to Rye!

Rye has detected that it's not installed on this computer yet and
automatically started the installer for you. For more information
read https://rye-up.com/guide/installation/

This installer will install rye to C:\Users\Gustav\.rye
This path can be changed by exporting the RYE_HOME environment variable.

Details:
  Rye Version: 0.32.0
  Platform: windows (x86_64)

✔ Continue? · yes
✔ What should running `python` or `python3` do when you are not inside a Rye managed project? · Run the old default Python (provided by your OS, pyenv, etc.)
Installed binary to C:\Users\Gustav\.rye\shims\rye.exe
Bootstrapping rye internals
Downloading cpython@3.12.2
Checking checksum
Unpacking
Downloaded cpython@3.12.2
Updated self-python installation at C:\Users\Gustav\.rye\self

All done!
Press any key to continue
❯ py .\example.py
error: Target Python binary 'python.exe' not found.
You are currently outside of a project. To resolve this, consider enabling global shims. Global shims allow for a Rye-managed Python installation.
For more information: https://rye-up.com/guide/shims/#global-shims

Note that I explicitly requested Rye to "Run the old default Python", by which I mean "don't change any behaviour outside of a Rye-managed project". This is clearly not what has happened.

It's also worth noting that I don't actually have a python executable installed on my PATH in my normal setup, I use the py interpreter exclusively to locate and run Python. The /usr/bin/env python shebang is interpreted by the py launcher to mean "run my default Python".

Expected Result

The script runs the same as it did before I installed Rye, printing my global Python (the one py -c "import sys; print(sys.executable)" would report).

Actual Result

An error from the new Rye shim for Python:

error: Target Python binary 'python.exe' not found.
You are currently outside of a project. To resolve this, consider enabling global shims. Global shims allow for a Rye-managed Python installation.
For more information: https://rye-up.com/guide/shims/#global-shims

Version Info

❯ rye --version
rye 0.32.0
commit: 0.32.0 (e1b4f2a29 2024-03-29)
platform: windows (x86_64)
self-python: cpython@3.12.2
symlink support: true
uv enabled: true

Stacktrace

N/A