Add GetReactState to CreatureMethods and GetKnownTaxiNodes, SetKnownTaxiNodes to PlayerMethods (#285)

Co-authored-by: iThorgrim <125808072+iThorgrim@users.noreply.github.com>

src/LuaEngine/methods/CreatureMethods.h

@@ -841,6 +841,27 @@ namespace LuaCreature
         return 1;
     }
 
+    /**
+     * Returns the [Creature]'s current ReactState.
+     *
+     * <pre>
+     * enum ReactState
+     * {
+     *     REACT_PASSIVE       = 0,
+     *     REACT_DEFENSIVE     = 1,
+     *     REACT_AGGRESSIVE    = 2
+     * };
+     * </pre>
+     *
+     * @return [ReactState] state
+     */
+    int GetReactState(lua_State* L, Creature* creature)
+    {
+        ReactStates state = creature->GetReactState();
+        lua_pushinteger(L, (int)state);
+        return 1;
+    }
+
     /**
      * Sets the [Creature]'s NPC flags to `flags`.
      *