[Frontend] Robust Form Management with React Hook Form

[Pushkarini579]

The upload form in src/app/upload/page.tsx uses basic useState for form fields.

• Refactor the form to use react-hook-form.
• Integrate zod for client-side validation.
• Improve error messaging UI for required fields.

[pericharlabindhumadhavi-data]

Hi @Pushkarini579, I would like to work on this issue under GSSoC.
I'll refactor the upload form using react-hook-form with zod validation
and improve the error messaging UI. Kindly assign it to me. Thank you!