Add all moderator pages to svelte

[PeterJFB]

What has been added?

See title:#

Todo:

• tests
  • Cypress stuff
  • Every endpoint is sending the expected request
  • Used MailCrab to see if generate_user was behaving as expected, Including opening the link in the mail and seeing the register update
• check if everything is consistent after rebase 👀
• Need to check onSubmit|preventDefault. It is supposed to suppress default redirect, but wont for some reason:P

Additional changes

• updated callApi to get correct typings based on result