Prefer running executables in the environment with `<name>` over `<name>/__main__.py` (#11431)
Closes https://github.com/astral-sh/uv/issues/11423
Closes https://github.com/astral-sh/uv/issues/9167
Closes https://github.com/astral-sh/uv/pull/9722
https://github.com/astral-sh/uv/pull/11431/commits/c23fc4024e1f4d3315ec385a2a5a3c6be1e2dae5
demonstrates the behavior.