[Frontend] [Backend] Add updateFaq functionality and Integrate it with Backend

[shivamgaur99]

Description:

Clicking on the update button should modify the content of the FAQ.

Add functionality to handle clicks on the "UPDATE" button for each FAQ. When clicked, it should open a dialogue with input fields to allow users to edit FAQ details.

Display a toast notification indicating a successful FAQ update after the update operation is completed.

Provide appropriate error messages in case the update operation fails.

please assign