refactors

src/timetable/assistant.rs

@@ -0,0 +1,9 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "PascalCase")]
+pub struct Assistant {
+    pub id: String,
+    pub is_present: bool,
+    pub student_id: String,
+}