feat: add errout for interactive for script support and atty for clean output

crates/gitnow/src/commands/shell.rs

@@ -0,0 +1,33 @@
+use zsh::ZshShell;
+
+pub mod zsh;
+
+#[derive(clap::Parser)]
+pub struct Shell {
+    #[command(subcommand)]
+    shell: ShellSubcommands,
+}
+
+impl Shell {
+    pub async fn execute(&mut self) -> anyhow::Result<()> {
+        self.shell.execute().await?;
+
+        Ok(())
+    }
+}
+
+#[derive(clap::Subcommand)]
+pub enum ShellSubcommands {
+    #[command()]
+    Zsh(ZshShell),
+}
+
+impl ShellSubcommands {
+    pub async fn execute(&mut self) -> anyhow::Result<()> {
+        match self {
+            ShellSubcommands::Zsh(zsh) => zsh.execute().await?,
+        }
+
+        Ok(())
+    }
+}