Set up folder structure for the command handlers.

src/command/mod.rs

@@ -0,0 +1,3 @@
+pub(crate) mod add_post;
+pub(crate) mod build;
+pub(crate) mod init;

src/main.rs

@@ -5,6 +5,7 @@ use clap::Parser;
 use self::cli::parameters::Cli;
 use self::cli::parameters::Commands;
 mod cli;
+mod command;
 
 fn main() -> Result<ExitCode, Box<dyn std::error::Error>> {
     let rt = tokio::runtime::Runtime::new()?;