Add love mode API to Animals

By: Parker Hawke <hawkeboyz2@hotmail.com>

paper-api/src/main/java/org/bukkit/entity/Animals.java

@@ -22,4 +22,30 @@ public interface Animals extends Ageable {
      * @param uuid new uuid, or null
      */
     void setBreedCause(UUID uuid);
+
+    /**
+     * Get whether or not this entity is in love mode and will produce
+     * offspring with another entity in love mode. Will return true if
+     * and only if {@link #getLoveModeTicks()} is greater than 0.
+     *
+     * @return true if in love mode, false otherwise
+     */
+    boolean isLoveMode();
+
+    /**
+     * Get the amount of ticks remaining for this entity in love mode.
+     * If the entity is not in love mode, 0 will be returned.
+     *
+     * @return the remaining love mode ticks
+     */
+    int getLoveModeTicks();
+
+    /**
+     * Set the amount of ticks for which this entity should be in love mode.
+     * Setting the love mode ticks to 600 is the equivalent of a player
+     * feeding the entity their breeding item of choice.
+     *
+     * @param ticks the love mode ticks. Must be positive
+     */
+    void setLoveModeTicks(int ticks);
 }