feat(cli): add version update notification (#141)

Implement version check and notification using update-informer
crate. This informs users of new versions with formatted messages
to encourage updates. Updated Cargo.toml and Cargo.lock files
to include new dependencies.

cli/Cargo.toml

@@ -31,6 +31,7 @@ slot.workspace = true
 starknet.workspace = true
 toml = "0.8"
 url.workspace = true
+update-informer = { version = "1.1", default-features = false, features = ["github"] }
 
 [[bin]]
 name = "slot"

cli/src/main.rs

@@ -4,6 +4,8 @@ mod command;
 
 use crate::command::Command;
 use clap::Parser;
+use colored::*;
+use update_informer::{registry, Check};
 
 /// Slot CLI for Cartridge
 #[derive(Parser, Debug)]
@@ -18,11 +20,31 @@ async fn main() {
     env_logger::init();
     let cli = Cli::parse();
 
+    let name = "cartridge-gg/slot";
+    let current = env!("CARGO_PKG_VERSION");
+    let informer = update_informer::new(registry::GitHub, name, current);
+
     match &cli.command.run().await {
         Ok(_) => {}
         Err(e) => {
             eprintln!("{e}");
             std::process::exit(1);
         }
     }
+
+    if let Some(version) = informer.check_version().ok().flatten() {
+        notify_new_version(current, version.to_string().as_str());
+    }
+}
+
+fn notify_new_version(current_version: &str, latest_version: &str) {
+    println!(
+        "\n{} {}{} → {}",
+        "Slot CLI update available:".bold(),
+        "v".red().bold(),
+        current_version.red().bold(),
+        latest_version.green().bold()
+    );
+    println!("To upgrade, run: {}", "`slotup`".cyan().bold());
+    println!("\n")
 }