narrow: add support for merging add and remove outside of the tracked set This extend f1eb77dceb36 to test and support the remaining action. Or, at least, the simple incarnation of them. Differential Revision: https://phab.mercurial-scm.org/D12181

[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