fix: resolve missing functions and unused imports

The commit adds `pub` to `mode_get` for visibility and removes unused imports in `src/modes/get.rs`, while adding the missing `get_engine` import.

src/modes/get.rs

@@ -1,6 +1,3 @@
-use std::io;
-use std::path::PathBuf;
-use std::collections::HashMap;
 
 use anyhow::{Context, Result, Error, anyhow};
 use clap::Command;