feat: add basic room-based adventure engine structure

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# Simple Text Adventure Engine

This engine allows you to define rooms and items in a simple Python structure.

## Usage

```python

class Room:

    def __init__(self, name, description):

        self.name = name

        self.description = description

        self.exits = {}

    def add_exit(self, direction, room):

        self.exits[direction] = room

def play_game(start_room):

    current_room = start_room

    while True:

        print(f"\n{current_room.name}")

        print(current_room.description)

        print("Exits:", ", ".join(current_room.exits.keys()))

        move = input("> ").lower()

        if move == "quit":

            break

        if move in current_room.exits:

            current_room = current_room.exits[move]

        else:

            print("You can't go that way.")

# Example setup

lobby = Room("Lobby", "A dusty lobby with a single door to the north.")

hallway = Room("Hallway", "A long hallway stretching north-south.")

lobby.add_exit("north", hallway)

hallway.add_exit("south", lobby)

# play_game(lobby)

```

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