Input test.

src/rpg/entity/entity.h

@@ -43,6 +43,7 @@ extern entity_t ENTITIES[ENTITY_COUNT];
 
 typedef struct {
   void (*init)(entity_t *entity);
+  void (*update)(entity_t *entity);
 } entitycallbacks_t;
 extern entitycallbacks_t ENTITY_CALLBACKS[ENTITY_TYPE_COUNT];
 
@@ -52,4 +53,20 @@ extern entitycallbacks_t ENTITY_CALLBACKS[ENTITY_TYPE_COUNT];
  * @param entity Pointer to the entity to initialize.
  * @param type The type of the entity to initialize.
  */
-void entityInit(entity_t *entity, const entitytype_t type);
+void entityInit(entity_t *entity, const entitytype_t type);
+
+/**
+ * Updates the entity's state based on its type.
+ * 
+ * @param entity Pointer to the entity to update.
+ */
+void entityUpdate(entity_t *entity);
+
+/**
+ * Resets the entity at a given position.
+ * 
+ * @param x The x-coordinate of the entity.
+ * @param y The y-coordinate of the entity.
+ * @return Pointer to the entity at the specified position, or NULL.
+ */
+entity_t * entityGetAt(const uint8_t x, const uint8_t y);