Our docs are built with MkDocs, which requires Python and several deps.
Previously those deps were managed with Poetry, which is also written in Python.
This commit replaces Poetry with `uv`, a Rust-based Python
project/package manager, and thus removes several steps from the docs
build process.
Before:
<install Python>
<install pipx>
pipx install poetry
poetry install
poetry run -- mkdocs serve
After:
<install uv>
uv run mkdocs serve
I initially was thinking of using `mdbook`, which looks a little better, but I
think versioning the docs is important, and the features I want are pretty much
only supported by the Mkdocs' "Material" theme.
Mkdocs is written in Python. The prerequesites for building docs on your
machine should be to install Python and Poetry, everything else should be
installed automatically by Poetry. See the edits to `contributing.md` for more details.
Otherwise, Git tries to resolve the conflict textually and introduces conflict markers, which make `cargo` unable to process the file (and therefore unable to resolve the conflicts automatically, such as with `cargo update`).
