hidden: support passing --hidden with `serve --stdio` This currently has no effect since the server code will filter the repository again. However, it is clearer to put this change in its own changeset. This will mostly impact ssh peers, clients being now able to pass --hidden when spawning the server. See the next changeset for details on how this is going to be used.

[build-system]
requires = ["setuptools", "wheel"]

[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true