Add subcommand support with colored help banner

Enable `clap` color feature, introduce subcommands (Sync, Add, Rm, Ls)
and a
custom before‑help banner, and update `main` to return a `Result`.

Cargo.toml

@@ -10,7 +10,7 @@ opt-level = 3
 strip = true
 
 [dependencies]
-clap = { version = "4.6.1", features = ["derive"] }
+clap = { version = "4.6.1", features = ["derive", "color"] }
 serde = { version = "1.0.228", features = ["derive"] }
 serde_yaml = "0.9.33"
 dirs = "6.0.0"                    # XDG paths cross-platform

src/cli.rs

@@ -1,8 +1,12 @@
 use crate::logs::init_logger;
-use clap::Parser;
+use clap::{Parser, Subcommand, builder::StyledStr};
 
 #[derive(Parser, Debug, Clone)]
-#[command(version, about = "Veil.rs", long_about = "Veil.rs")]
+#[command(
+    version,
+    before_help = before_help(),
+    subcommand_required = false
+)]
 pub struct Cli {
     #[arg(
         long,
@@ -11,6 +15,17 @@ pub struct Cli {
         default_value_t = false
     )]
     pub log: bool,
+
+    #[command(subcommand)]
+    pub command: Cmds,
+}
+
+#[derive(Subcommand, Clone, Debug)]
+pub enum Cmds {
+    Sync,
+    Add,
+    Rm,
+    Ls,
 }
 
 impl Cli {
@@ -24,3 +39,22 @@ impl Cli {
         args
     }
 }
+
+fn before_help() -> StyledStr {
+    const BANNER: &str = r#"
+    ____   ____     .__.__
+    \   \ /   /____ |__|  |     _______  ______
+     \   Y   // __ \|  |  |     \_  __ \/  ___/
+      \     /\  ___/|  |  |__    |  | \/\___ \
+       \___/  \___  >__|____/ /\ |__|  /____  >
+                  \/          \/            \/
+    "#;
+
+    format!(
+        "{}\n{}\t\t{}",
+        BANNER,
+        "Declarative Tauri wrapper",
+        format!("v{}", env!("CARGO_PKG_VERSION"))
+    )
+    .into()
+}

src/main.rs

@@ -1,7 +1,8 @@
+use std::io::Result;
 use veil_rs::cli::Cli;
 
-fn main() {
+fn main() -> Result<()> {
     let args: Cli = Cli::get_args();
 
-    println!("Hello, world!");
+    Ok(())
 }