[tor-relays] Introducing new bridge status page

As part of our ongoing effort to reimplement BridgeDB, we now have a bridge status page that shows if a bridge's pluggable transports work:

https://bridges.torproject.org/status?id=FINGERPRINT

FINGERPRINT is your bridge's fingerprint or its hashed fingerprint -- either works.

The backend tests bridges every 18 hours by making a tor process fetch the bridge's descriptor. Tor bridges will soon log a URL pointing to this status page: https://gitlab.torproject.org/tpo/core/tor/-/issues/30477

As of today, 89% of all pluggable transports work.

Cheers, Philipp