Add support for tool.uv into distribution building (#3904)

With the change, we remove the special casing of workspace dependencies
and resolve `tool.uv` for all git and directory distributions. This
gives us support for non-editable workspace dependencies and path
dependencies in other workspaces. It removes a lot of special casing
around workspaces. These changes are the groundwork for supporting
`tool.uv` with dynamic metadata.

The basis for this change is moving `Requirement` from
`distribution-types` to `pypi-types` and the lowering logic from
`uv-requirements` to `uv-distribution`. This changes should be split out
in separate PRs.

I've included an example workspace `albatross-root-workspace2` where
`bird-feeder` depends on `a` from another workspace `ab`. There's a
bunch of failing tests and regressed error messages that still need
fixing. It does fix the audited package count for the workspace tests.

crates/uv-resolver/src/prerelease_mode.rs

@@ -1,4 +1,4 @@
-use distribution_types::RequirementSource;
+use pypi_types::RequirementSource;
 use rustc_hash::FxHashSet;
 
 use pep508_rs::MarkerEnvironment;