Better handle "--More--" messages in NLE

[BartekCupial]

This PR introduces an AutoMore wrapper to automatically handle the "--More--" prompts that appear when the game's output exceeds the screen size or message. Previously handling of "--More--" prompts was done in a postprocessing step within the clean_message method. This change improves modularity, makes it easier to manage and extend the functionality without altering the core environment logic.

        message = self.nle_language.text_message(obs["tty_chars"]).decode("latin-1")

        while "--More--" in message and not done:
            message = message.replace("--More--", "\n")

            action_index = self.env.actions.index(A.MiscAction.MORE)
            obs, rew, done, info = super().step(action_index)
            add = self.nle_language.text_message(obs["tty_chars"]).decode("latin-1")
            message += add
            reward += rew

[BartekCupial]

@DavidePaglieri should be ready to merge now

[DavidePaglieri]

LGTM!