support for imperfect monorepos

[sebasv]

• fix typo in docs
• Add Hatch to classifiers in pyproject
• find workspace root according to the workspace pyproject entry to allow workspaces that do not live in a git repo root
• clean dependency names before comparison: the dependencies section could be specifying "foo-bar>=1.5", referencing a workspace member foo_bar.
• use package name from pyproject instead of folder name to match dependencies
• do not throw an error if a (file-)url based dependency is listed under tool.uv.sources

[carderne]

Thanks for all these fixes and improvements! Will make a new release after merging this.