refactor: combine activeUser and User to one collection

[Dun-sin]

👨‍💻 Changes proposed(What did you do ?)

• delete activeUser collection/model
• change User model to have the same fields as activeUser had
• created a function to generate the right kind of id acceptable by mongodb
• pass loginid when creating a user
• change every ActiveUser ref to User
• when deleting an ActiveUser only delete them if they don't have an email so we can check the actual amount of users we have

✔️ Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• This PR does not contain plagiarized content.
• The title and description of the PR is clear and explains the approach.

[render]

Your Render PR Server URL is https://whischat-pr-642.onrender.com.

Follow its progress at https://dashboard.render.com/web/srv-cqsvpghu0jms738o6h0g.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
whisper	❌ Failed (Inspect)			Aug 12, 2024 0:16am
whisper-b2p2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 12, 2024 0:16am