Implement backend API for landmarks, trip optimization, and toilet locations

- Added landmarks_router.py to handle landmark retrieval based on user preferences and location.
- Implemented optimization_router.py for trip optimization, including handling preferences and landmarks.
- Created toilets_router.py to fetch toilet locations within a specified radius from a given location.
- Enhanced error handling and logging across all new endpoints.
- Generated a comprehensive report.html for test results and environment details.

backend/src/utils/take_most_important.py

@@ -1,24 +0,0 @@
-"""Helper function to return only the major landmarks from a large list."""
-from ..structs.landmark import Landmark
-
-def take_most_important(
-    landmarks: list[Landmark],
-    n_important: int
-) -> list[Landmark]:
-    """
-    Given a list of landmarks, return the most important landmarks based on their attractiveness.
-    
-    Args:
-        landmarks (list[Landmark]): List of landmarks that needs to be truncated
-        n_important (int): Number of most important landmarks to return
-    
-    Returns:
-        list[Landmark]: List of the n_important most important landmarks
-    """
-    if n_important == 0 :
-        raise ValueError('Number of landmarks to keep cannot be zero.')
-
-    # Sort landmarks by attractiveness (descending)
-    sorted_landmarks = sorted(landmarks, key=lambda x: x.attractiveness, reverse=True)
-
-    return sorted_landmarks[:n_important]