[TASK-79] Email Subscription functionality

[yacosta738]

Email Subscription functionality:

• [TASK-80] Design the Subscription Form #52

• [TASK-81] Backend Setup #55

• Subscribers Crud View #109

• Embed Subscriber Forms #123

• Email Confirmation: After a user submits their email address, send them a confirmation email. This email should contain a link that the user can click to confirm their subscription.

• Unsubscribe Option: Every email you send to your subscribers should contain an unsubscribe link. When a user clicks this link, they should be removed from your mailing list.

• Email Content Creation: Regularly create and send content to your subscribers. This could be a weekly newsletter, updates about your project, or promotional content.

• Compliance with Email Laws: Ensure that your email subscription service complies with international email laws like CAN-SPAM Act or GDPR.

• Testing: Before going live, thoroughly test your email subscription functionality. Make sure that the subscription and unsubscription processes work smoothly and that emails display correctly on all devices.

• Analytics: Implement analytics to track the performance of your emails. Monitor metrics like open rates, click-through rates, and unsubscribe rates to understand how your audience is engaging with your content.