Configurable chance for wolves to spawn rabid

Configurable chance to spawn a wolf that is rabid.
Rabid wolves attack all players, mobs, and animals.

purpur-api/paper-patches/files/src/main/java/org/bukkit/entity/Wolf.java.patch

@@ -0,0 +1,23 @@
+--- a/src/main/java/org/bukkit/entity/Wolf.java
++++ b/src/main/java/org/bukkit/entity/Wolf.java
+@@ -108,4 +_,20 @@
+             return Registry.WOLF_VARIANT.getOrThrow(NamespacedKey.minecraft(key));
+         }
+     }
++
++    // Purpur start
++    /**
++     * Checks if this wolf is rabid
++     *
++     * @return whether the wolf is rabid
++     */
++    public boolean isRabid();
++
++    /**
++     * Sets this wolf to be rabid or not
++     *
++     * @param rabid whether the wolf should be rabid
++     */
++    public void setRabid(boolean rabid);
++    // Purpur end
+ }