Add clap and update scripts

src/main.rs

@@ -6,20 +6,31 @@ mod interface;
 mod movegen;
 mod search;
 
+use clap::{Parser, ValueEnum};
 use interface::uci;
 
+#[derive(Parser, Debug)]
+#[command(version, about, long_about = None)]
+struct Args {
+    #[arg(short, long)]
+    mode: Mode,
+}
+
+#[derive(ValueEnum, Debug, Clone, Copy)]
+pub enum Mode {
+    Perft,
+    Uci,
+}
+
 fn main() {
     movegen::attack::init_attacks();
 
-    let command = std::env::args().nth(1).unwrap_or(String::from("quit"));
-    match command.as_str() {
-        "perft" => search::perft::perftree_script(),
-        "uci" => {
+    match Args::parse().mode {
+        Mode::Perft => search::perft::perftree_script(),
+        Mode::Uci => {
             let input = io::stdin().lock();
             let output = io::stdout().lock();
             uci::uci_loop(input, output).unwrap_or_else(|e| println!("{}", e));
         }
-        "quit" => println!("Exiting.."),
-        _ => println!("Wrong command. Exiting.."),
-    };
+    }
 }