Backend api for itinerary boyu

[Skyeee3]

• Optimize the priority of opening hours in the algorithm
• Return itinerary item details
• Update attraction csv
• Provide busyness corresponding to event
• Create an API to provide weather forecast for each day within a specified date range
• Distribute itinerary items to each day as evenly as possible
• Ensure that only attractions/events can be successfully scheduled
• Provide hourly busyness for each zone on each day of the specified date

[HelloMum]

I will merge to resolve the connections directly on dev.