fix: Improve registry name errors?

Because of workspace inheritance, the errors aren't the greatest

src/cargo/util_schemas/manifest.rs

@@ -572,7 +572,7 @@ impl<'de, P: Deserialize<'de> + Clone> de::Deserialize<'de> for TomlDependency<P
 #[serde(rename_all = "kebab-case")]
 pub struct TomlDetailedDependency<P: Clone = String> {
     pub version: Option<String>,
-    pub registry: Option<String>,
+    pub registry: Option<RegistryName>,
     /// The URL of the `registry` field.
     /// This is an internal implementation detail. When Cargo creates a
     /// package, it replaces `registry` with `registry-index` so that the
@@ -1177,6 +1177,15 @@ impl<T: AsRef<str>> PackageName<T> {
     }
 }
 
+str_newtype!(RegistryName);
+
+impl<T: AsRef<str>> RegistryName<T> {
+    pub fn new(name: T) -> Result<Self> {
+        restricted_names::validate_package_name(name.as_ref(), "registry name", "")?;
+        Ok(Self(name))
+    }
+}
+
 str_newtype!(ProfileName);
 
 impl<T: AsRef<str>> ProfileName<T> {

tests/testsuite/alt_registry.rs

@@ -715,7 +715,14 @@ fn bad_registry_name() {
 [ERROR] failed to parse manifest at `[CWD]/Cargo.toml`
 
 Caused by:
-  invalid character ` ` in registry name: `bad name`, [..]",
+  TOML parse error at line 7, column 17
+    |
+  7 |                 [dependencies.bar]
+    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  invalid character ` ` in registry name: `bad name`, [..]
+
+
+",
         )
         .run();
 
@@ -1618,7 +1625,14 @@ fn empty_dependency_registry() {
 [ERROR] failed to parse manifest at `[CWD]/Cargo.toml`
 
 Caused by:
-  registry name cannot be empty",
+  TOML parse error at line 7, column 23
+    |
+  7 |                 bar = { version = \"0.1.0\", registry = \"\" }
+    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  registry name cannot be empty
+
+
+",
         )
         .run();
 }