fix: add missing std::io import and remove unused import

src/compression.rs

@@ -1,3 +1,4 @@
+use std::io;
 use anyhow::{anyhow, Context, Result};
 use std::io::{Read, Write};
 use std::path::PathBuf;

src/modes/get.rs

@@ -1,7 +1,7 @@
 use anyhow::anyhow;
 
 use crate::compression::CompressionType;
-use std::io::BufWriter;
+// use std::io::BufWriter;  // Removed unused import
 use clap::Command;
 use std::path::PathBuf;
 use std::str::FromStr;