feat(platform): interactive wizard to configure Telegram + Discord bots

New command: 'gyandoot platform configure'

Walks users through:
1. Telegram bot token input (from @BotFather)
2. Discord bot token + guild ID input
3. Summary showing which platforms are configured
4. Saves [platform] section to config.toml

Existing 'gyandoot setup' and flat config parser also handle
the new [platform] section format.

src/main.rs

@@ -81,6 +81,12 @@ enum Commands {
         #[command(subcommand)]
         action: ServiceAction,
     },
+    /// Configure messaging platforms (Telegram, Discord)
+    #[command(name = "platform")]
+    Platform {
+        #[command(subcommand)]
+        action: PlatformAction,
+    },
 }
 
 #[derive(Subcommand, Debug)]
@@ -132,6 +138,13 @@ enum ServiceAction {
     Status,
 }
 
+#[derive(Subcommand, Debug)]
+enum PlatformAction {
+    /// Interactive wizard to configure Telegram and Discord bots
+    #[command(name = "configure")]
+    Configure,
+}
+
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
     let cli = Cli::parse();
@@ -180,6 +193,9 @@ async fn main() -> anyhow::Result<()> {
         Some(Commands::Service { action }) => {
             cmd_service(action).await?;
         }
+        Some(Commands::Platform { action }) => {
+            cmd_platform(action).await?;
+        }
         None => {
             // Default: run interactive CLI mode
             cmd_run(&cli.profile, "cli", None).await?;
@@ -714,4 +730,26 @@ async fn cmd_service(action: ServiceAction) -> anyhow::Result<()> {
         }
     }
     Ok(())
-}
+}
+/// Configure messaging platforms (Telegram, Discord)
+async fn cmd_platform(action: PlatformAction) -> anyhow::Result<()> {
+    match action {
+        PlatformAction::Configure => {
+            tracing::info!("Starting platform configuration wizard");
+            match gyandoot_tui::platform::run_platform_wizard() {
+                Ok(Some(_config)) => {
+                    println!("✅ Platform configuration saved!");
+                    println!("   Run 'gyandoot serve' to start the gateway.");
+                }
+                Ok(None) => {
+                    println!("Platform configuration cancelled.");
+                }
+                Err(e) => {
+                    tracing::error!("Platform wizard failed: {}", e);
+                    eprintln!("Platform setup error: {}", e);
+                }
+            }
+        }
+    }
+    Ok(())
+}