Support for `pyproject.toml` (and `cargo.toml`)

[kdeldycke]

In addition to have lychee search for configuration in the .lycheeignore and lychee.toml file, I would love to have the possibility of adding lychee-specific configuration into a pyproject.toml file.

That way I can have all the configuration of the tools I use for my Python project nicely arranged in a single pyproject.toml file. For that to work, lychee-specific configuration needs to be put under its own section, like [tool.lychee].

I know lychee is not a Python-specific project, and is not written in Python. But that does not prevent it to be nice to the Python ecosystem.

A good example is the typos utility, which is written in Rust, but is supporting reading its configuration both from a pyproject.toml and a cargo.toml file:

• Support for pyproject.toml crate-ci/typos#361
• Support for pyproject.toml crate-ci/typos#361
• Allow config in Cargo.toml crate-ci/typos#1060

[kdeldycke]

Other reasons to support pyproject.toml: lots of project documentation are written in Sphinx (which is written in Python), so native support of pyproject.toml could help the adoption of Lychee in this community to check documentation links.