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-dev/src/build.rs

@@ -11,7 +11,7 @@ use uv_build::{SourceBuild, SourceBuildContext};
 use uv_cache::{Cache, CacheArgs};
 use uv_client::RegistryClientBuilder;
 use uv_configuration::{
-    BuildKind, Concurrency, ConfigSettings, NoBinary, NoBuild, SetupPyStrategy,
+    BuildKind, Concurrency, ConfigSettings, NoBinary, NoBuild, PreviewMode, SetupPyStrategy,
 };
 use uv_dispatch::BuildDispatch;
 use uv_interpreter::PythonEnvironment;
@@ -80,6 +80,7 @@ pub(crate) async fn build(args: BuildArgs) -> Result<PathBuf> {
         &NoBuild::None,
         &NoBinary::None,
         concurrency,
+        PreviewMode::Enabled,
     );
 
     let builder = SourceBuild::setup(

crates/uv-dev/src/generate_json_schema.rs

@@ -20,7 +20,7 @@ struct ToolUv {
     #[serde(flatten)]
     options: Options,
     #[serde(flatten)]
-    dep_spec: uv_requirements::pyproject::ToolUv,
+    dep_spec: uv_distribution::pyproject::ToolUv,
 }
 
 #[derive(clap::Args)]