♻️ refactor(trash): separate trash preparation and execution

- split the run function into prepare and batch_trash
- prepare is for fetching the list, batch_trash will execute the move to trash

src/trash.rs

@@ -20,14 +20,18 @@ impl Trash {
         &mut self.message_list
     }
 
-    /// Run the trash cli
-    pub async fn run(&mut self, pages: u32) -> Result<()> {
+    /// Prepare the trash cli
+    pub async fn prepare(&mut self, pages: u32) -> Result<()> {
         self.message_list.run(pages).await?;
-        self.batch_move_to_trash().await?;
 
         Ok(())
     }
 
+    /// Move the messages to trash
+    pub async fn batch_trash(&self) -> Result<()> {
+        self.batch_move_to_trash().await
+    }
+
     async fn batch_move_to_trash(&self) -> Result<()> {
         let add_label_ids = Some(Vec::from(["TRASH".to_string()]));
         let ids = Some(self.message_list.message_ids());