Adjust bot module visibility and decrease interval duration

The bot module within the 'discord' directory is now private, but its Handler is publicly accessible. This restructuring improves encapsulation and keeps implementation detail away from the public interface. Additionally, the bot's processing loop interval has been reduced from 1200 to 900 milliseconds, potentially increasing response time.

src/bin/bootstrap.rs

@@ -5,7 +5,7 @@ use tokio;
 
 use dotenv;
 
-use gpt_discord_bot::bot::Handler;
+use gpt_discord_bot::Handler;
 
 #[tokio::main]
 async fn main() {

src/discord/bot.rs

@@ -56,7 +56,7 @@ impl EventHandler for Handler {
             };
 
             let mut result = String::new();
-            let mut interval = interval(Duration::from_millis(1200));
+            let mut interval = interval(Duration::from_millis(900));
 
             loop {
                 select! {

src/discord/mod.rs

@@ -1 +1,2 @@
-pub mod bot;
+mod bot;
+pub use bot::Handler;

src/lib.rs

@@ -1,2 +1,2 @@
 mod discord;
-pub use crate::discord::bot;
+pub use crate::discord::Handler;