Automatically detect when uv is being used

Feature

If .venv/bin/python exists in the root of the project (where the pyproject.toml file is), then automatically use it as the python executable with priority over /usr/bin/python.

Pitch

This feature would make uv work out of the box, instead of a user having to figure out that they need to add --python-executable=.venv/bin/python to the mypy command that they run.

Alternative solutions

There could also be a help note if .venv/bin/python exists and mypy cannot find implementations or library stubs for the majority of the imports, that suggests adding --python-executable=.venv/bin/python to the mypy command.

まず、既存の --python-executable オプションと、mypy が pyproject.toml を含むプロジェクトルートをどのように特定するかを追跡します。.venv/bin/python が存在する場合の動作を確認し、/usr/bin/python より優先されることも含めて、 自動選択のカバレッジを追加します。uv プロジェクトが追加のオプションなしで動作すれば完了です。