Aa-fleetpings

Added

- Hint text to the "Announcement Text" field with a link to Discord Markdown

Changed

- Some code/internal improvements
- Minimum Requirement:
- Alliance Auth >= 3.2.0

Added

- Warning about ping spam when `everyone` is selected as target. Hopefully this
will fight ping spam a little.

Fixed

- Don't show `::` in front of the ping text headline when no ping target is selected

Changed

- Simplified checks for mandatory fields in JS (If you're still using Internet
Explorer 11 or older, you should feel bad and update to a modern browser)

Fixed

- Some typos

Changed

- Templates cleaned up and re-organized
- Minimum Requirement:
- Alliance Auth >= 2.14.0

Fixed

- Issue: Custom ping targets not auto-linking in Discord properly. ([74])

Added

- Missing `helper` directory