Aa-rss-to-discord

Changed

- Added some sanity checks to the task

Added

- Commands for the Discord bot to manage RSS/Atom feeds. The following commands have
been added:

| Command | Options | What it does |
| :------------------------------ | :------------------------------------------------------------------------------------ | :--------------------------------------------------------------- |
| `!rss_add <rss_url> <rss_name>` | `rss_url` - The URL of the RSS/Atom feed<br>`rss_name` - A Name for the RSS/Atom Feed | Adding a RSS/Atom feed to the current channel |
| `!rss_delete <rss_feed_id>` | `rss_feed_id` - The ID of the RSS/Atom feed you want to remove | Remove a RSS/Atom feed from the current Discord channel |
| `!rss_disable <rss_feed_id>` | `rss_feed_id` - The ID of the RSS/Atom feed you want to disable | Disable an enabled RSS/Atom feed for the current Discord channel |
| `!rss_enable <rss_feed_id>` | `rss_feed_id` - The ID of the RSS/Atom feed you want to enable | Enable a disabled RSS/Atom feed for the current Discord channel |
| `!rss_list` | None | List all RSS/Atom feeds for the <br/>current Discord channel |

Changed

- Moved from Beta to Stable

Added

- Tested for compatibility with Python 3.9 and Django 3.2

Changed

- Update the last item instead of removing and adding it again

Added

- Switch to enable/disable RSS feeds in admin interface

Changed

- Cleaned up the filter in admin interface