large refactor: reorganize code

src/commands/ping.rs

@@ -0,0 +1,17 @@
+use crate::common::{Context, Error};
+
+/// Display the bot's latency to Discord's REST and Gateway APIs
+#[poise::command(slash_command, prefix_command)]
+pub async fn ping(ctx: Context<'_>) -> Result<(), Error> {
+    use std::time::Instant;
+
+    let start = Instant::now();
+    let msg = ctx.say("Pong! \u{1F3D3}").await?;
+    let time = start.elapsed();
+
+    msg.edit(ctx, poise::reply::CreateReply::default()
+        .content(format!("Pong! \u{1F3D3}\nREST: {:.2?}\nGateway: {:.2?}",
+                         time, ctx.ping().await))).await?;
+
+    Ok(())
+}