chore: Use PEP 735 dependency groups metadata (#170)

Replaces the `uv`-specific metadata in `pyproject.toml` with PEP
735 standard "dependency-groups". `uv` will respect and write this
field like before.

Author: manzt

pyproject.toml

@@ -41,8 +41,8 @@ fuse = [
     "simple-httpfs"
 ]
 
-[tool.uv]
-dev-dependencies = [
+[dependency-groups]
+dev = [
     "anywidget[dev]",
     "jupyterlab",
     "pytest",