refactor: build one binary instead of a library and a binary

src/main.rs

@@ -1,6 +1,9 @@
 use std::process::ExitCode;
 
-use ahab::{cli, command_builder, scripts};
+mod cli;
+mod command_builder;
+mod compose;
+mod scripts;
 
 use anyhow::Result;
 use clap::Parser;