added categorization and lat long to events scraped from calendar

[liamjdavis]

This pull request includes significant changes to the calendar_scraper and calendar_saver modules in the access_amherst_backend package, focusing on simplifying the codebase and improving the categorization and location handling of events. The most important changes include removing location handling from the calendar_parser, moving it to the calendar_saver, and enhancing the event categorization logic.

Codebase simplification:

• Removed the location_buckets dictionary and related functions (categorize_location, get_lat_lng, add_random_offset) from calendar_parser.py. [1] [2]
• Simplified the scrape_page function by removing location categorization and coordinate assignment. [1] [2]

Location handling and categorization improvements:

• Added the location_buckets dictionary and related functions (categorize_location, get_lat_lng, add_random_offset) to calendar_saver.py. [1] [2]
• Enhanced the save_calendar_event_to_db function to include location categorization and coordinate assignment, and improved the event categorization logic using TfidfVectorizer. [1] [2]

Testing updates:

• Removed tests related to location categorization and coordinate retrieval from test_calendar_parser.py.