feat: Initialized Discord bot

- Bump version to 0.6.0
- discord: Added /quest list
- discord: Added /quest create (admin)

discord/src/commands/mod.rs

@@ -0,0 +1,12 @@
+//use poise::{CreateReply, serenity_prelude as serenity};
+
+use crate::{Context, Error};
+
+pub mod quest;
+
+
+#[poise::command(prefix_command)]
+pub async fn register(ctx: Context<'_>) -> Result<(), Error> {
+    poise::builtins::register_application_commands_buttons(ctx).await?;
+    Ok(())
+}