feat: add disposable email validation to email schema

[akash3444]

Description

This PR adds validation to prevent users from registering with disposable email addresses.

Changes Made

• Added a JSON file containing a list of common disposable email domains.
• Implemented a validation function isDisposableEmail to check email domains against the list.

Checklist

• [ ] I have tagged the issue in this PR.
• [x] I have attached necessary screenshots.
• [x] I have provided a short description of the PR.
• [x] I ran yarn build and build is successful
• [x] My code follows the style guidelines of this project.
• [ ] I have added necessary documentation (if applicable)

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