[BACKEND] Create events collection

[aleckshen]

Is your feature request related to a problem? Please describe

There is currently no way to store or manage events (socials, tournaments, etc.) in the system.

Describe the solution you'd like

Create a new Events collection in src/payload/collections/Events.ts and register it in src/payload.config.ts.

Fields:

Field	Type	Required	Notes
title	text	yes
description	richText	yes	Uses the existing Lexical editor
eventType	select	yes	Options: social-session, event
date	date	yes
startTime	text	yes	e.g. 18:00
endTime	text	no
location	text	yes
image	upload	no	relationTo: 'media'
maxCapacity	number	yes
waitlistCapacity	number	no	Default: 0
memberPrice	number	no	In cents, e.g. 500 = $5.00
nonMemberPrice	number	no	In cents
registrationOpenAt	date	no	When sign-ups open
registrationCloseAt	date	no	When sign-ups close
status	select	yes	Options: upcoming, ongoing, completed, cancelled. Default: upcoming

Access control:

Operation	Rule
read	Public (no login required)
create / update / delete	Admins only

Describe alternatives you've considered

No alternatives considered — a dedicated collection is the standard Payload approach for structured content like events.

Additional context

After creating the collection, run pnpm payload generate:types to regenerate payload-types.ts.

Ref: https://payloadcms.com/docs/configuration/collections

BEFORE MERGING

• Code generation run (hint: pnpm typegen)
• PR Reviewed (For non-trivial changes)
• All required PR checks passing