feat(certificate): add admin side configuration for cert templates

[geraldsberongoy]

✨ What’s New?

This pull request introduces several new dependencies to the frontend project, primarily to support certificate generation and rendering features. Additionally, it implements a new server action for saving certificate configurations and updates the survey submission flow to generate and return a certificate upon completion.

Dependency additions for certificate generation and rendering:

• Added @vercel/og and satori to both package.json and package-lock.json to enable dynamic Open Graph image and certificate rendering. These packages bring in a number of supporting dependencies, such as @resvg/resvg-wasm, @shuding/opentype.js, and others for CSS and font parsing, emoji handling, and layout. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21]

Certificate configuration and generation features:

• Added a new server action saveCertificateConfigAction in certificateActions.ts that allows authorized event organizers to save certificate configuration data to the database, with proper error handling and logging.
• Updated the survey submission flow in surveyActions.ts to:
  • Fetch the user's full name from the users table (preferring database values over auth metadata).
  • Generate a certificate using the new generateCertificate service after a successful survey submission.
  • Return the generated certificate as a base64-encoded string in the response. [1] [2]

These changes lay the groundwork for supporting dynamic certificate creation and management in the application.

📷 Screenshots (IMPORTANT)

Closes #156