1.21.5 Update, rebase to Adventure components

[Romindous]

Please look over this and see if you'd like to add / remove anything, ty :D

[ZockerAxel]

Hey, just wanted to chime in since I've been essentially ignoring this.

The original reason for moving to paperweight for building was only to make it possible to depend on the API using Jitpack, since without it we couldn't build against NMS easily. I never intended to move to or even support Paper and introducing Adventure Component Support would break Spigot compatibility, something that was never the idea.

Another issue that is slowly pulling Paper from Spigot is that it's no longer a hard Spigot fork, which, as I correctly predicted, will cause me headaches down the line.

Since I'm pretty starved of time lately, I figured that I should just ignore this, since the fork works perfectly well without me anyways.

[Romindous]

Hi Axel :D

Yea i haven't rly intended for this to support Spigot, i originally forked it to include in my plugin (for a Paper server), and then one of the community members reached out and asked for the same thing so I just published it.

Things have been pretty autonomous so far and I've only had to update some NMS things for every version, as Mojang changed packet structure. In the future I may add a thing to automatically structure avancements in organized trees in the menu, rather than having to do it by hand, but thats all.