Add --open flag support to the docs server

src/cli.rs

@@ -37,6 +37,14 @@
 //!
 //! let args = Args::parse();
 //! ```
+//!
+//! # Running the Bot
+//!
+//! To start the bot, run:
+//!
+//! ```shell
+//! $ cargo run -- start [TOKEN]
+//! ```
 
 /// Payphone's argument parser.
 #[derive(clap::Parser)]
@@ -130,5 +138,15 @@ pub enum Commands {
             default_value_t = 3000
         )]
         port: u16,
+
+        #[arg(
+            long,
+            short,
+            env = "PAYPHONE_DOCS_OPEN",
+            value_name = "OPEN",
+            default_value_t = false,
+            help = "Open the documentation in the default browser after starting the server."
+        )]
+        open: bool,
     },
 }