adding missing cli file

src/cli.rs

@@ -0,0 +1,8 @@
+use clap::Parser;
+
+#[derive(Parser, Debug, Clone)]
+#[command(author, version, about, long_about = None)]
+pub struct Args {
+    #[arg(short, long, default_value_t = String::from("http://127.0.0.1:10000"))]
+    pub grpc_address: String,
+}