fix(cli): Fix npm package name in tauri add (#12354)

Author: FabianLars

.changes/cli-add-pkgname.md

@@ -0,0 +1,6 @@
+---
+tauri-cli: 'patch:bug'
+'@tauri-apps/cli': 'patch:bug'
+---
+
+Fixed and issue that caused `tauri add` to try to install incorrect npm packages.

crates/tauri-cli/src/add.rs

@@ -58,7 +58,7 @@ pub fn run(options: Options) -> Result<()> {
   let plugin_snake_case = plugin.replace('-', "_");
   let crate_name = format!("tauri-plugin-{plugin}");
   let npm_name = if is_known {
-    format!("tauri-apps/plugin-{plugin}")
+    format!("@tauri-apps/plugin-{plugin}")
   } else {
     format!("tauri-plugin-{plugin}-api")
   };