refac call submission and event watch

• refac call submission and event watch
• add commands
• implement config formatter
• document it

src/conf.rs

@@ -27,6 +27,25 @@ impl std::default::Default for Config {
 	}
 }
 
+impl std::fmt::Display for Config {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		let secret = if self.secret.is_some() {
+			"(secret defined)"
+		} else {
+			"(no secret)"
+		};
+		let address = if let Some(address) = &self.address {
+			format!("{}", address)
+		} else {
+			"(no address)".to_string()
+		};
+		writeln!(f, "Ğcli config")?;
+		writeln!(f, "duniter endpoint {}", self.duniter_endpoint)?;
+		writeln!(f, "indexer endpoint {}", self.indexer_endpoint)?;
+		write!(f, "address {address} {secret}")
+	}
+}
+
 /// load config file and manage error if could not
 pub fn load_conf() -> Config {
 	match confy::load(APP_NAME, None) {
@@ -68,7 +87,7 @@ pub fn handle_command(data: Data, command: Subcommand) -> anyhow::Result<()> {
 			);
 		}
 		Subcommand::Show => {
-			println!("{:?}", data.cfg);
+			println!("{}", data.cfg);
 		}
 		Subcommand::Save => {
 			confy::store(APP_NAME, None, &data.cfg).expect("unable to write config");