feat: add subcommands cli, serve

src/cli.rs

@@ -0,0 +1,18 @@
+use clap::{App, Arg, ArgMatches, SubCommand};
+use rust_util::simple_error;
+use rust_util::util_clap::{Command, CommandError};
+
+pub struct CommandImpl;
+
+impl Command for CommandImpl {
+    fn name(&self) -> &str { "cli" }
+    
+    fn subcommand<'a>(&self) -> App<'a, 'a> {
+        SubCommand::with_name(self.name()).about("Local mini KMS cli")
+            .arg(Arg::with_name("connect").long("connect").takes_value(true).default_value("127.0.0.1:6567").help("Connect server"))
+    }
+
+    fn run(&self, _arg_matches: &ArgMatches, sub_arg_matches: &ArgMatches) -> CommandError {
+        simple_error!("Not implemented")
+    }
+}