Add webhook management UI page

[MissBlue00]

Task

Build a webhook endpoint management page in the dashboard.

Details

• List all registered webhook endpoints
• Add create endpoint form with URL and secret fields
• Add delete endpoint button with confirmation
• Show recent delivery failures per endpoint
• Display last delivery timestamp and status

Path

• apps/frontend/app/dashboard/webhooks/

Test

Run pnpm --filter frontend build to verify.

[cyb3ralee]

@smartalee has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this pls 🙌

ℹ️ Repo Maintainers: To accept this application, review their application or assign @smartalee to this issue.

[eliassmthl-collab]

@eliassmthl-collab has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

i will do justice to this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @eliassmthl-collab to this issue.