I know people can get into the Room of Requirement through the passageway leading from the Hog's Head. But can living, sentient beings like animals or people be transported into the RoR if you wish for it, or does the RoR only transport inanimate objects like books or Sneakoscopes?
I think if the room of requirement was at any other location other than inside Hogwarts it could have. It transforms into whatever you require and fills itself with anything you need only if it is in bounds with the laws of magic at that place (e.g it cannot provide you with food - this is applicable globally). But Hogwarts has unprecedented security measures against people just appearing inside the castle through any means (yes it did miss out on the vanishing cabinet). Due to these restrictions on magic that could be performed in Hogwarts the Room of Requirement as mentioned in the story, cannot get people or living things inside the room.