refactor: move api calls to routes folder; feat: add update_banner user-friendly method; fix: change file data type

itd/routes/notifications.py

@@ -0,0 +1,16 @@
+from itd.request import fetch
+
+def get_notifications(token: str, limit: int = 20, cursor: int = 0, type: str | None = None):
+    data = {'limit': str(limit), 'cursor': str(cursor)}
+    if type:
+        data['type'] = type
+    return fetch(token, 'get', 'notifications', data)
+
+def mark_as_read(token: str, id: str):
+    return fetch(token, 'post', f'notification/{id}/read')
+
+def mark_all_as_read(token: str):
+    return fetch(token, 'post', f'notification/read-all')
+
+def get_unread_notifications_count(token: str):
+    return fetch(token, 'get', 'notifications/count')