Add Mountain Trail area with room definitions and Python implementation

@@ -82,3 +82,26 @@ hidden_chamber.add_exit("west", secret_passage)

# Connect Great Hall to Secret Passage

great_hall.add_exit("behind-tapestry", secret_passage)

```

## Mountain Trail Area

- **Mountain Base**: The air is crisp and the path begins to climb steeply. Exits: north (Rocky Path), south (Forest Entrance).

- **Rocky Path**: Loose stones make the footing treacherous. The view is spectacular. Exits: north (Mountain Peak), south (Mountain Base).

- **Mountain Peak**: You've reached the summit. The world stretches out below you in every direction. Exits: south (Rocky Path).

## Mountain Trail Implementation

```python

mountain_base = Room("Mountain Base", "The air is crisp and the path begins to climb steeply.")

rocky_path = Room("Rocky Path", "Loose stones make the footing treacherous. The view is spectacular.")

mountain_peak = Room("Mountain Peak", "You've reached the summit. The world stretches out below you in every direction.")

mountain_base.add_exit("north", rocky_path)

mountain_base.add_exit("south", forest_entrance)

rocky_path.add_exit("north", mountain_peak)

rocky_path.add_exit("south", mountain_base)

mountain_peak.add_exit("south", rocky_path)

# Connect Forest Entrance to Mountain Base

forest_entrance.add_exit("up", mountain_base)

```