Anki flashcards deck for learning and recall

**Is your feature request related to a problem? Please describe.**
An (Anki) deck of flashcards would make learning and recalling the DroneAid symbols even easier

**Describe the solution you'd like**
- Deck
- Card(s)
- Image + Visual Description
- Meaning

**Describe alternatives you've considered**
- js quiz
- https://h5p.org/content-types-and-applications
- jsfiddle w/ the source

**Additional context**
- https://en.wikipedia.org/wiki/Anki_(software)
- https://docs.ankiweb.net/getting-started.html
- https://docs.ankiweb.net/importing.html
- https://github.com/ankitects/anki-manual/blob/main/src/importing.md