Custom Waypoints

THIS IS ONLY FOR PAPER / SPIGOT SERVERS

* Added waypoint actions in config.yml, per waypoint id (or * for every waypoint)
* remove_radius: removes the waypoint when a player walks into it, no extra command needed
* remove_only_for_player: remove it only for the player who reached it, or for everyone
* on_remove: runs when the waypoint is removed (radius, /waypointplugin remove, timer end or follow target death)
* step_radius and on_step: run actions when a player walks into a waypoint, without removing it
* execute_only_once: on_step runs only once per player until a reload or the waypoint is set again
* Actions support console_command, wait, wait_ticks, %player%, %waypoint% and PlaceholderAPI
* Added /waypointplugin reload
* Added /waypointplugin figure with every figure option (shapes, animations, pitch, roll, width)
* Added follow_horizontal and follow_vertical rotations, fade_out and opacity
* Sounds accept any sound id, with autocomplete
* Follow targets autocomplete online players
* Follow waypoints are no longer removed when the followed player dies
* Works with Fabric, Forge and NeoForge clients