* backend api
- superadmin has admin access to all archives
- new superadmin endpoints: /archives/all/crawls and /archives/all/crawls/<crawl_id>.json for list all running crawls
and loading crawl data by id
- frontend superadmin view (fixes#201)
* show all archives on superadmin home page
* show jump to crawl for super admin (#200)
* navbar links for: all archives, all running crawls and jump to crawl
Co-authored-by: sua yoo <sua@suayoo.com>
