fix: resolve compilation errors and warnings in keep crate

Co-authored-by: aider (openai/andrew.openrouter.qwen.qwen3-coder) <aider@aider.chat>

src/main.rs

@@ -9,13 +9,10 @@ extern crate directories;
 use directories::ProjectDirs;
 
 extern crate prettytable;
-use prettytable::format;
 use prettytable::format::consts::FORMAT_NO_BORDER_LINE_SEPARATOR;
-use prettytable::format::{Alignment, TableFormat};
 
 use std::str::FromStr;
 
-#[macro_use]
 extern crate lazy_static;
 
 pub mod compression_engine;