SPIGOT-7850: Add API for Bogged shear state

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

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

@@ -6,5 +6,5 @@ import org.jetbrains.annotations.ApiStatus;
  * Represents a Bogged Skeleton.
  */
 @ApiStatus.Experimental
-public interface Bogged extends AbstractSkeleton {
+public interface Bogged extends AbstractSkeleton, Shearable {
 }

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

@@ -0,0 +1,21 @@
+package org.bukkit.entity;
+
+/**
+ * Represents an entity which can be shorn with shears.
+ */
+public interface Shearable {
+
+    /**
+     * Gets whether the entity is in its sheared state.
+     *
+     * @return Whether the entity is sheared.
+     */
+    boolean isSheared();
+
+    /**
+     * Sets whether the entity is in its sheared state.
+     *
+     * @param flag Whether to shear the entity
+     */
+    void setSheared(boolean flag);
+}

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

@@ -5,15 +5,5 @@ import org.bukkit.material.Colorable;
 /**
  * Represents a Sheep.
  */
-public interface Sheep extends Animals, Colorable {
-
-    /**
-     * @return Whether the sheep is sheared.
-     */
-    public boolean isSheared();
-
-    /**
-     * @param flag Whether to shear the sheep
-     */
-    public void setSheared(boolean flag);
+public interface Sheep extends Animals, Colorable, Shearable {
 }