feat(pm): support add package

Author: fengmk2

crates/vite_error/src/lib.rs

@@ -133,6 +133,9 @@ pub enum Error {
     #[error("Unrecognized any package manager, please specify the package manager")]
     UnrecognizedPackageManager,
 
+    #[error("No packages specified. Usage: vite add <packages>...")]
+    NoPackagesSpecified,
+
     #[error(
         "Package manager {name}@{version} in {package_json_path:?} is invalid, expected format: 'package-manager-name@major.minor.patch'"
     )]