refactor: rewrite in rust

src/cli/commands/completions.rs

@@ -0,0 +1,11 @@
+use clap::CommandFactory;
+use clap_complete::{generate, Shell};
+use std::io;
+
+use crate::cli::Cli;
+
+pub fn run(shell: Shell) {
+    let mut cmd = Cli::command();
+    let name = cmd.get_name().to_string();
+    generate(shell, &mut cmd, name, &mut io::stdout());
+}