feat: add ngit checkout command for non-interactive proposal checkout

Adds a new 'ngit checkout <event-id|nevent>' command that creates or
updates a proposal branch and checks it out. Supports both PRs and
patches with parent-commit references.

Phase 1 of non-interactive ngit list implementation.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/bin/ngit/main.rs b/src/bin/ngit/main.rs
index b6b51d0..2c9e10f 100644
--- a/src/bin/ngit/main.rs
+++ b/src/bin/ngit/main.rs
@@ -53,6 +53,7 @@ async fn main() {
             }
             Commands::Send(args) => sub_commands::send::launch(&cli, args, false).await,
             Commands::Sync(args) => sub_commands::sync::launch(args).await,
+            Commands::Checkout { id } => sub_commands::checkout::launch(id).await,
         }
     } else {
         // Handle the case where no command is provided