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

itd/routes/reports.py

@@ -0,0 +1,4 @@
+from itd.request import fetch
+
+def report(token: str, id: str, type: str = 'post', reason: str = 'other', description: str = ''):
+    return fetch(token, 'post', 'reports', {'targetId': id, 'targetType': type, 'reason': reason, 'description': description})