refactor: organization pages

[ruilopesm]

• [ ] Index of organizations
  • [ ] Search feature
  • [x] Pagination
  • [ ] GitHub-like card for each organization
• [ ] Show of an organization
• [ ] Create an organization (with unverified status, by default)
• [ ] Edit an organization (only admins on that organization can do so)
• [ ] Permissions system inside the organization
• [ ] Handlers for an organization (like @cesium)
• [ ] Children organizations