Housekeeping for the scripts (#413)

Cleanup:

- Removed pointless reversed when creating issue list (it is sorted
  afterwards)
- Removed create_topic as no longer needed see https://codeberg.org/fediverse/fep/issues/274
- Made scripts executable

Reviewed-on: https://codeberg.org/fediverse/fep/pulls/413
Reviewed-by: silverpill <silverpill@noreply.codeberg.org>
Co-authored-by: Helge <helge.krueger@gmail.com>
Co-committed-by: Helge <helge.krueger@gmail.com>

scripts/create_issue.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 from argparse import ArgumentParser
 from datetime import date, timedelta
 from tools import FepFile