Fix Authentication Form: Validate Email Field and Disable Buttons During Requests

[HarshTiwari-err]

Email Validation:

Implemented validation to ensure that the email field is not empty before attempting to trigger the sign-in process. If the email field is empty, an error toast is displayed to prompt the user to enter a valid email address.

Loading State Management:

Introduced a clickedMethod state to track which authentication method is currently in progress. Disables the email input and all authentication buttons when a request is ongoing to prevent multiple submissions.

[vercel[bot]]

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[HarshTiwari-err]

I have read the CLA Document and I hereby sign the CLA

[mfts]

@HarshTiwari-err unfortunately mohdjami already added his PR. I cannot award you