Fixed #1559 -- Refactor BaseContactForm to use built-in AkismetContactForm

[ANISH-SR]

This PR refactors the 'BaseContactForm' in 'contact/forms.py' to utilize the built-in 'AkismetContactForm' from the current version of django-contact-form. This change simplifies our codebase and leverages the maintained functionality provided by the library.

Key changes:

1. Updated 'BaseContactForm' to inherit from 'AkismetContactForm' instead of 'ContactForm'.
2. Removed the custom 'clean_body()' method as Akismet spam checking is now handled by the parent class.
3. Added an 'init' method to properly handle the request object needed for Akismet functionality.
4. Removed unused imports related to the old implementation.
5. Maintained all existing custom fields and methods (subject, message, etc.).

Please review and let me know if any further changes or testing are needed.

[ANISH-SR]

Hii @bmispelon, just a gentle reminder, if you could review my PR and give me feedback. A feedback would be really helpful and valuable
Thanks for your time!

[bmispelon]

Hi and thanks for your PR. Please be mindful of other contributors, if you look at the history of the issue, you'll see that it was recently assigned to someone else.

I've enabled the CI checks to run on your PR and I see that the tests are failing, can you look into it? It seems it has something to do with the request not being passed correctly.

Also please be patient with reviews. This project is volunteer run, and a lot of us (well, me anyway) are on summer holidays right now.

[ANISH-SR]

Hi @bmispelon, Thank you for your feedback and for running the CI checks. I apologize for the oversight regarding the issue assignment - I'm new to open source contributions and I'll be more careful to check this in future PRs.

I appreciate you taking the time to review my work and provide guidance. I'll look into the failing tests and the issue with passing the 'request' correctly. I'll update the PR once I've made the necessary changes to address these problems.

As a new contributor, I'm eager to learn and improve. If you have any resources or tips that could help me better understand the project's workflow or contribution process, I'd be grateful.

I understand the project is volunteer-run and appreciate your time in reviewing this PR, especially during the holiday season. Please let me know if you need any further information from me or if there's anything else I can do to improve my contribution.