SPIGOT-5908: CompassMeta for new lodestone compass data

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/inventory/meta/CompassMeta.java

@@ -0,0 +1,57 @@
+package org.bukkit.inventory.meta;
+
+import org.bukkit.Location;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Represents a compass that can track a specific location.
+ */
+public interface CompassMeta extends ItemMeta {
+
+    /**
+     * Checks if this compass has been paired to a lodestone.
+     *
+     * @return paired status
+     */
+    boolean hasLodestone();
+
+    /**
+     * Gets the location that this compass will point to.
+     *
+     * Check {@link #hasLodestone()} first!
+     *
+     * @return lodestone location
+     */
+    @Nullable
+    Location getLodestone();
+
+    /**
+     * Sets the location this lodestone compass will point to.
+     *
+     * @param lodestone new location or null to clear
+     */
+    void setLodestone(@Nullable Location lodestone);
+
+    /**
+     * Gets if this compass is tracking a specific lodestone.
+     *
+     * If true the compass will only work if there is a lodestone at the tracked
+     * location.
+     *
+     * @return lodestone tracked
+     */
+    boolean isLodestoneTracked();
+
+    /**
+     * Sets if this compass is tracking a specific lodestone.
+     *
+     * If true the compass will only work if there is a lodestone at the tracked
+     * location.
+     *
+     * @param tracked new tracked status
+     */
+    void setLodestoneTracked(boolean tracked);
+
+    @Override
+    CompassMeta clone();
+}