Add Plugin Chunk Ticket API

Allows plugins to force certain chunks to be kept loaded for as long as they are enabled.

By: Spottedleaf <Spottedleaf@users.noreply.github.com>

paper-server/nms-patches/Ticket.patch

@@ -0,0 +1,20 @@
+--- a/net/minecraft/server/Ticket.java
++++ b/net/minecraft/server/Ticket.java
+@@ -6,7 +6,7 @@
+ 
+     private final TicketType<T> a;
+     private final int b;
+-    private final T c;
++    public final T c; // CraftBukkit - private -> public // PAIL identifier
+     private final long d;
+ 
+     protected Ticket(TicketType<T> tickettype, int i, T t0, long j) {
+@@ -24,7 +24,7 @@
+         } else {
+             int j = Integer.compare(System.identityHashCode(this.a), System.identityHashCode(ticket.a));
+ 
+-            return j != 0 ? j : this.a.a().compare(this.c, ticket.c);
++            return j != 0 ? j : this.a.a().compare(this.c, (T) ticket.c); // CraftBukkit - decompile error
+         }
+     }
+