Add script to update events and resources

[MysteryBlokHed]

Problem

• The only way to add resources and events to the database, currently, is to either:
  • manually do so through the Supabase UI; or
  • manually do so with a SQL query

Action items

• Add a script to insert new events and resources, to be used until there's a proper admin page
  • Do so using the Drizzle ORM
  • Allow a relatively user-friendly way of inputting event data
  • Maybe: also add a method to upload an image to the Supabase store for events

Acceptance criteria

• Events and resources can be added with a friendlier interface