feat!: first pass re-implementation of banner, gcal command

src/bot/commands/ics.rs

@@ -0,0 +1,25 @@
+//! ICS command implementation for generating calendar files.
+
+use crate::bot::{Context, Error};
+
+/// Generate an ICS file for a course
+#[poise::command(slash_command, prefix_command)]
+pub async fn ics(
+    ctx: Context<'_>,
+    #[description = "Course Reference Number (CRN)"] crn: i32,
+) -> Result<(), Error> {
+    ctx.defer().await?;
+
+    // TODO: Get BannerApi from context or global state
+    // TODO: Get current term dynamically
+    let term = 202510; // Hardcoded for now
+
+    // TODO: Implement actual ICS file generation
+    ctx.say(format!(
+        "ICS command not yet implemented - BannerApi integration needed\nCRN: {}, Term: {}",
+        crn, term
+    ))
+    .await?;
+
+    Ok(())
+}