refactor: migrate from Next 12 to 13 - WIP

[itspedr0]

Quick notes:

To start working on this project, follow @aysllanferreira Kutt notes until step 5: https://pinely.atlassian.net/wiki/spaces/~63fc95c67c30bbd6b33daa3f/pages/378503169/Kutt+Notes

Add fixed values on the publicRuntimeConfig inside next.config.js because this is another issue we have, it's not recognizing env variables.

// next.config.js

const { parsed: localEnv } = require("dotenv").config();

module.exports = {
  publicRuntimeConfig: {
    CONTACT_EMAIL: "your@email.com",
    SITE_NAME: "Kutt",
    DEFAULT_DOMAIN: "your-domain.com",
    RECAPTCHA_SITE_KEY: null,
    REPORT_EMAIL: "your@email.com",
    DISALLOW_ANONYMOUS_LINKS: false,
    DISALLOW_REGISTRATION: false
  }
};

There are still some routes to be moved to the app router.