WIP: Add playlist tab to beatmap table, implements #40

[SpellcheckerExtraordinaire]

This adds a new tab in the local beatmap data table that displays the thumbnails of all playlists the respective beatmap is a part of, as was suggested in #40.

As I am totally unfamiliar with vue itself I might not adhere to common best practices, if anything stands out let me know.
One thing I was not able to do is overlapping the thumbnails, like your difficulty chips do. I would suppose with some familiarity this should be a two minute fix, so I'd appreciate a pointer in the right direction.

I'm on your discord with the username AngryEndUser, so you can message me over there if you like.

[SpellcheckerExtraordinaire]

The code smell is interesting, as the PlaylistLocal import is definitely being used, but only as a type annotation. I assume sonarcloud only checks the compiled javascript? Then the import would indeed lose its purpose, but in that case I wonder why the tsc doesn't just get rid of it during compilation. Anyhow, I personally like annotations for readability, I can get rid of it if you want though.

[Alaanor]

Awesome, thanks for the PR. Just a few change and it's all good for me 👍

The code review should answer some of your questions. As for sonarcloud you're right, false positive, you can ignore it.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
1 Code Smell

No Coverage information
0.0% Duplication