perf: separate Clone implementation for Draft struct and remove trait bound from struct definition

Improve around 2% - 16% CPU performance

crates/clash-verge-draft/src/lib.rs

@@ -6,8 +6,8 @@ type DraftInner<T> = (SharedDraft<T>, Option<SharedDraft<T>>);
 
 /// Draft 管理：committed 与 optional draft 都以 Arc<Box<T>> 存储，
 // (committed_snapshot, optional_draft_snapshot)
-#[derive(Debug, Clone)]
-pub struct Draft<T: Clone> {
+#[derive(Debug)]
+pub struct Draft<T> {
     inner: Arc<RwLock<DraftInner<T>>>,
 }
 
@@ -90,3 +90,11 @@ impl<T: Clone> Draft<T> {
         Ok(res)
     }
 }
+
+impl<T: Clone> Clone for Draft<T> {
+    fn clone(&self) -> Self {
+        Self {
+            inner: Arc::clone(&self.inner),
+        }
+    }
+}