feat: implement magic link sign in (#5036)

frontend/rust-lib/flowy-user-pub/src/cloud.rs

@@ -142,6 +142,9 @@ pub trait UserCloudService: Send + Sync + 'static {
     password: &str,
   ) -> FutureResult<UserProfile, FlowyError>;
 
+  fn sign_in_with_magic_link(&self, email: &str, redirect_to: &str)
+    -> FutureResult<(), FlowyError>;
+
   /// When the user opens the OAuth URL, it redirects to the corresponding provider's OAuth web page.
   /// After the user is authenticated, the browser will open a deep link to the AppFlowy app (iOS, macOS, etc.),
   /// which will call [Client::sign_in_with_url]generate_sign_in_url_with_email to sign in.