feat: Implement clone_box for head, tail, and skip filters

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/filter_plugin/head.rs

@@ -32,6 +32,12 @@ impl FilterPlugin for HeadBytesFilter {
         }
         Ok(())
     }
+
+    fn clone_box(&self) -> Box<dyn FilterPlugin> {
+        Box::new(Self {
+            remaining: self.remaining,
+        })
+    }
 }
 
 pub struct HeadLinesFilter {
@@ -63,4 +69,10 @@ impl FilterPlugin for HeadLinesFilter {
         }
         Ok(())
     }
+
+    fn clone_box(&self) -> Box<dyn FilterPlugin> {
+        Box::new(Self {
+            remaining: self.remaining,
+        })
+    }
 }

src/filter_plugin/skip.rs

@@ -54,6 +54,12 @@ impl FilterPlugin for SkipBytesFilter {
         std::io::copy(&mut *reader, &mut *writer)?;
         Ok(())
     }
+
+    fn clone_box(&self) -> Box<dyn FilterPlugin> {
+        Box::new(Self {
+            remaining: self.remaining,
+        })
+    }
 }
 
 pub struct SkipLinesFilter {
@@ -102,4 +108,10 @@ impl FilterPlugin for SkipLinesFilter {
         }
         Ok(())
     }
+
+    fn clone_box(&self) -> Box<dyn FilterPlugin> {
+        Box::new(Self {
+            remaining: self.remaining,
+        })
+    }
 }

src/filter_plugin/tail.rs

@@ -61,6 +61,13 @@ impl FilterPlugin for TailBytesFilter {
         (&mut *writer).write_all(&result)?;
         Ok(())
     }
+
+    fn clone_box(&self) -> Box<dyn FilterPlugin> {
+        Box::new(Self {
+            buffer: self.buffer.clone(),
+            count: self.count,
+        })
+    }
 }
 
 pub struct TailLinesFilter {
@@ -115,4 +122,11 @@ impl FilterPlugin for TailLinesFilter {
         }
         Ok(())
     }
+
+    fn clone_box(&self) -> Box<dyn FilterPlugin> {
+        Box::new(Self {
+            lines: self.lines.clone(),
+            count: self.count,
+        })
+    }
 }