feat: add four skeletons of commands

src/command/join.rs

@@ -0,0 +1,24 @@
+use std::sync::LazyLock;
+
+use twilight_model::application::{
+    command::{Command, CommandType},
+    interaction::application_command::CommandData,
+};
+use twilight_util::builder::command::CommandBuilder;
+
+use crate::command::State;
+
+const NAME: &str = "join";
+const DESCRIPTION: &str = "The bot will join the same VC as you (with intention to record)";
+
+pub static COMMAND: LazyLock<Command> = LazyLock::new(|| {
+    CommandBuilder::new(NAME, DESCRIPTION, CommandType::ChatInput)
+        .validate()
+        .expect("command wasn't correct")
+        .build()
+});
+
+#[tracing::instrument]
+pub async fn handle(state: State, data: CommandData) {
+    todo!();
+}