No-Tick view distance implementation - Closes #3196

Implements world view distance getters/setters

Per-Player is absent due to difficulty of maintaining
the diff required to make it happen.

Spigot-API-Patches/0204-World-view-distance-api.patch

@@ -0,0 +1,48 @@
+From 919aecffc9c10f8e95f114e326cae396bd48e409 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Tue, 5 May 2020 21:28:01 -0700
+Subject: [PATCH] World view distance api
+
+
+diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
+index db18f70e..421ad6a9 100644
+--- a/src/main/java/org/bukkit/World.java
++++ b/src/main/java/org/bukkit/World.java
+@@ -3166,6 +3166,34 @@ public interface World extends PluginMessageRecipient, Metadatable {
+     int getViewDistance();
+     // Spigot end
+
++    // Paper start - view distance api
++    /**
++     * Sets the view distance for this world.
++     * @param viewDistance view distance in [2, 32]
++     */
++    void setViewDistance(int viewDistance);
++
++    /**
++     * Returns the no-tick view distance for this world.
++     * <p>
++     * No-tick view distance is the view distance where chunks will load, however the chunks and their entities will not
++     * be set to tick.
++     * </p>
++     * @return The no-tick view distance for this world.
++     */
++    int getNoTickViewDistance();
++
++    /**
++     * Sets the no-tick view distance for this world.
++     * <p>
++     * No-tick view distance is the view distance where chunks will load, however the chunks and their entities will not
++     * be set to tick.
++     * </p>
++     * @param viewDistance view distance in [2, 32]
++     */
++    void setNoTickViewDistance(int viewDistance);
++    // Paper end - view distance api
++
+     // Spigot start
+     public class Spigot {
+
+-- 
+2.26.0
+