Add cli crate

tta-cli/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "tta-cli"
+version = { workspace = true }
+edition = { workspace = true }
+
+[dependencies]
+clap = { workspace = true }
+tta = { workspace = true }
+
+[lints]
+workspace = true

tta-cli/src/main.rs

@@ -0,0 +1,11 @@
+use clap::Parser;
+
+#[derive(Parser)]
+struct Args {
+    greetee: String,
+}
+
+fn main() {
+    let args = Args::parse();
+    println!("{}", tta::greet(&args.greetee));
+}