[BACKEND] Create executives collection

[aleckshen]

Is your feature request related to a problem? Please describe

There is no way for admins to manage executive team member profiles through the CMS. The executive team page requires structured data (name, role, photo, bio) that should be editable without code changes.

Describe the solution you'd like

Create an Executives collection at src/payload/collections/Executives.ts and register it in src/payload.config.ts.

Fields:

Field	Type	Required	Notes
name	text	yes	Full name
role	text	yes	e.g. "Co-President", "Treasurer"
bio	textarea	no	Short bio / description
photo	upload	no	relationTo: 'media'
order	number	no	For controlling display order on the frontend

Access control:

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

Describe alternatives you've considered

Hardcoding executive info in the frontend was considered, but a CMS collection allows the exec team to update their profiles each year without developer involvement.

Additional context

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

This collection has no dependencies on any other ticket.

Labels: feature, good first issue

BEFORE MERGING

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