Add equipment management to events

- Add equipmentProvided and requiredItems fields to Event model
- Update event creation form with equipment section
- Allow organizers to specify if equipment is provided or BYO
- Display required items list in event details
- Update database schema and run migration

server/prisma/migrations/20251118193723_add_equipment_fields/migration.sql

@@ -0,0 +1,3 @@
+-- Add equipment fields to events table
+ALTER TABLE `events` ADD COLUMN `equipment_provided` BOOLEAN DEFAULT false AFTER `photos`;
+ALTER TABLE `events` ADD COLUMN `required_items` JSON AFTER `equipment_provided`;