✨ feat(trash): implement trash functionality

- add trash struct and methods for moving messages to trash
- implement batch move to trash functionality

src/trash.rs

@@ -0,0 +1,78 @@
+use google_gmail1::api::BatchModifyMessagesRequest;
+
+use crate::{Error, MessageList};
+
+/// Struct for trashing messages
+#[derive(Debug)]
+pub struct Trash {
+    message_list: MessageList,
+}
+
+impl Trash {
+    /// Create a new Trash struct
+    pub async fn new(credential: &str) -> Result<Self, Error> {
+        let message_list = MessageList::new(credential).await?;
+        Ok(Trash { message_list })
+    }
+
+    /// Set the maximum results
+    pub fn set_max_results(&mut self, value: u32) {
+        self.message_list.set_max_results(value);
+    }
+
+    /// Report the maximum results value
+    pub fn max_results(&self) -> u32 {
+        self.message_list.max_results()
+    }
+
+    /// Add label to the labels collection
+    pub fn add_labels(&mut self, label_ids: &[String]) {
+        self.message_list.add_labels(label_ids)
+    }
+
+    /// Set the query string
+    pub fn set_query(&mut self, query: &str) {
+        self.message_list.set_query(query)
+    }
+
+    /// Run the trash cli
+    pub async fn run(&mut self, pages: u32) -> Result<(), Error> {
+        self.message_list.run(pages).await?;
+        self.batch_move_to_trash().await?;
+
+        Ok(())
+    }
+
+    async fn batch_move_to_trash(&self) -> Result<(), Error> {
+        let add_label_ids = Some(Vec::from(["TRASH".to_string()]));
+        let ids = Some(self.message_list.message_ids());
+        let remove_label_ids = Some(self.message_list.label_ids());
+
+        let batch_request = BatchModifyMessagesRequest {
+            add_label_ids,
+            ids,
+            remove_label_ids,
+        };
+
+        log::debug!("{batch_request:#?}");
+
+        let res = self
+            .message_list
+            .hub()
+            .users()
+            .messages_batch_modify(batch_request, "me")
+            .add_scope("https://www.googleapis.com/auth/gmail.modify")
+            .doit()
+            .await
+            .map_err(Box::new)?;
+
+        log::debug!("{res:#?}");
+
+        for id in self.message_list.message_ids() {
+            // log::info!("Message with subject `{subject}` move to trash.");
+            log::info!("Message with id `{id}` moved to trash.");
+        }
+
+        Ok(())
+    }
+}