CIRP: Link reports to OONI Explorer country pages

[agrabeli]

As part of the Censorship Incident Reporting Platform (CIRP), we're tracking the related country (or countries) for each report (as part of the process of creating and publishing a report).

It would therefore be nice if we could automatically link each CIRP report to the relevant OONI Explorer country page (https://explorer.ooni.org/countries).

That way, when a user goes to an OONI Explorer country page (e.g. Thailand), they will view all the CIRP reports pertaining to Thailand (in addition to the main research reports from that country, which are already automatically linked/provided).

This is not necessary for the public launch of the platform. I'm mainly tracking this for future work.