Add Link as a provider

[aminoz007]

Summary

Add "link" as an option in the list of providers.

Desired Behaviour

The status page covers now "status page io", "status io, google, rss feed and NRQL. That covers probably the majority of the use cases. However, some pages don't provide an API or RSS feed, for these ones it would be nice to be able to add a tile with just a link to see the status page. This way this app can be used as the source of truth for status pages even for those that don't provide RSS feeds or APIs.

Additional context

with this last feature, all cases should be covered!