BUG: Remove firebase auth and implement appwrite authentication

[siwamsingh]

Is there an existing issue for this?

• [X] I have searched the existing issues

What happened?

1. Create a new branch named 'auth' in the repository.

2. Remove the Firebase authentication from the current login button functionality.

3. Implement Appwrite for handling login and registration. Develop an authService class containing methods for login and registration.

4. Feel free to reach out for any clarifications on these tasks.

5. Introduce an alert box that pops up when the "Get Started" button is clicked, notifying the user to log in if they are not currently authenticated.

6. Discord -id : siwam_singh

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