Rastrum: Trails & Waypoints

Tested on Hytale 0.7.7.

• A new Rastrum screen. The top shows what is happening now: "Where to?", "Going to…" with the distance and how far above or below, or "Recording route". Below it, up to four shortcuts for the moment (get out of a cave, where you just died, a friend who called, your lantern), then your destinations by category with a search. Type x z in the search to go to a coordinate.
• A HUD in the corner while you are guided or recording: destination, distance, above or below. No need to open the screen.
• Recorded routes. Click "Record route", walk, and save it as "Only me" or "My group". The sparks then follow the exact way you walked, around trees, hills and water.
• Server roads. The admin saves routes as roads. When you pick a destination, the sparks lead to the nearest road and along it, switching roads where two cross, when that gets you there. The way is worked out once per click, not every step.
• Route scrolls. Turn one of your routes into an item (1 Old Scroll + 1 Inkwell) and give it to another player. Right click it to follow the route.
• Ariadne thread. Underground (rock, soil or ore above your head; leaves do not count), your way down is recorded on its own. "Get me out of here" or /trail out leads you back to the open sky, even without the lantern in hand.
• Deaths are kept. "Where I died" shows your last three deaths, kept by the game across restarts. The way to your death shows even without the lantern in hand: it fell with your items.
• Several lanterns. Each one on the ground has a name (change it in the screen) and you pick which one guides you. The admin sets how many per player (default 3). Light or put out a lantern from its "Name" form.
• On the map and compass. Your destinations, lanterns and group destinations show on the world map, with "Guide me here" on right click. The current destination shows on the compass, with an arrow when it is above or below you.
• Group. Joining a group now needs the player to accept: "Add" sends an invite (5 minutes), answered on the group screen or with /trail accept / /trail decline. Follow a group member to where they are now, or "Call the group" to you for 10 minutes. Each player chooses if the group can follow them and if the group sees where they died; both are off by default.
• Server destinations, discovered and with an arrival. The admin can hide a destination until a player passes by it, and set what happens on arrival: a title, a sound, and a console command with {player} (once per player). Commands are only set by the admin in the panel, never by another mod's file.
• Admin panel: four new settings (map and compass, Ariadne thread, lanterns per player, routes per player), "Arrival" on each server destination, and a new Roads tab.
• "Stop" now also stops the way back to the lantern until you pick it again or walk back to it.
• Coming back to the server no longer turns on the way back to your lantern by itself: it only resumes if you left while following it.
• New commands: /trail record, save <name>, cancel, go <name>, out, follow <name>, call, accept <name>, decline <name>, scroll <route>, and road <name> (admin).

New data files: routes.json, prefs.json and discoveries.json (created on first use). Nothing else changed: just replace the jar.