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

itd/routes/search.py

@@ -0,0 +1,4 @@
+from itd.request import fetch
+
+def search(token: str, query: str, user_limit: int = 5, hashtag_limit: int = 5):
+    return fetch(token, 'get', 'search', {'userLimit': user_limit, 'hashtagLimit': hashtag_limit, 'q': query})