Use type hints in code from uv init

crates/uv/src/commands/project/init.rs

@@ -471,7 +471,7 @@ impl InitProjectKind {
                 fs_err::write(
                     init_py,
                     indoc::formatdoc! {r#"
-                    def hello():
+                    def hello() -> None:
                         print("Hello from {name}!")
                     "#},
                 )?;

crates/uv/tests/init.rs

@@ -294,7 +294,7 @@ fn init_application_package() -> Result<()> {
     }, {
         assert_snapshot!(
             init, @r###"
-        def hello():
+        def hello() -> None:
             print("Hello from foo!")
         "###
         );

docs/concepts/projects.md

@@ -230,7 +230,7 @@ example-packaged-app
 But the module defines a CLI function:
 
 ```python title="__init__.py"
-def hello():
+def hello() -> None:
     print("Hello from example-packaged-app!")
 ```