feat: add project deletion for rejected projects

[Sithumli]

This PR implements the project deletion feature requested in issue #54, allowing administrators to permanently delete rejected projects and all associated data.

What changed

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• Added DELETE API endpoint at /api/admin/projects/[projectId]/delete
• Added cascade deletion of all related records (details, status, associations, slides, team, social links)
• Added Azure blob storage cleanup for project images (cover, logo, team profiles)
• Added DeleteProjectDialog confirmation component with warning message
• Added useDeleteProject hook for delete state management
• Added trash icon button in RejectedProjectsTable (visible to ADMIN only)
• Integrated delete flow in admin projects page with toast notifications

Why

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• Rejected projects currently remain in the database indefinitely
• Administrators need a way to clean up rejected submissions and free storage
• Related blob storage images were never cleaned up, causing unnecessary storage costs

Scope

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• Admin projects management page (/admin/projects)
• Rejected projects tab and table component
• New API endpoint for project deletion
• Blob storage cleanup utility

Testing performed

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• Created local MySQL database via Docker
• Seeded test rejected projects
• Verified delete button appears only for ADMIN users
• Confirmed project and all related records removed from database
• Verified UI updates after successful deletion

Closes #54

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[Copilot]

Pull request overview

Implements an admin-only flow to permanently delete rejected projects, including database cleanup of related project records and attempting Azure Blob Storage cleanup for stored images. This supports issue #54 by enabling removal of rejected submissions and associated storage usage from the admin projects management UI.

Changes:

• Added a new admin DELETE API endpoint to delete a project and its related records, plus blob cleanup logic.
• Added a reusable useDeleteProject hook and a DeleteProjectDialog confirmation dialog.
• Extended the rejected projects table + admin projects page to expose and wire up a delete action for admins.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
hooks/project/useDeleteProject.ts	New hook to call the delete endpoint and manage loading/error/success state.
components/tables/RejectedProjectsTable.tsx	Adds optional delete action UI (trash button) for rejected projects.
components/dialogs/DeleteProjectDialog.tsx	New confirmation dialog describing irreversible deletion impact.
app/api/admin/projects/[projectId]/delete/route.ts	New server route to delete project data in Prisma and trigger blob deletion.
app/(admin)/admin/projects/page.tsx	Wires delete dialog + hook into rejected projects tab with toast feedback.

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[agzaiyenth]

@Sithumli Please resolve the co-pilot comments first.

[agzaiyenth]

Was this tested properly?

[agzaiyenth]

@Sithumli we can't leave the delete api accessible to the public
when executing the delete endpoint it has to check for the user role and execute only if the user is admin
also can we close this PR and create a new PR requesting to merge into 'Version 2 release' Branch
we have implemented Asgardeo Auth, please take the session user's role from there, do the validation before executing the API, this is to ensure that public can't delete the projects.

[Sithumli]

@agzaiyenth As requested I've addressed the comments and created a new PR #209 targeting the version-2-release branch. Ready for review when you have time. Thanks! :)