The specified service (i.e. whoogle) should be used for the redirect if
explicitly stated, rather than randomly fetching an instance for the
provided URL.

For instance:

- farside.link/https://google.com/search?q=balatro can redirect to a
  whoogle or searxng instance.
- farside.link/whoogle/search?q=balatro will always redirect to a
  whoogle instance.

BreezeWiki requires the subdomain of a fandom link to be preserved when
routing, otherwise the redirect doesn't work correctly.

Cleaned up readme examples

The project was rewritten from Elixir to Go, primarily because:

- I don't write Elixir anymore and don't want to maintain a project in a
  language I no longer write
- I already write Go for other projects, including my day job, so it's
  a safer bet for a project that I want to maintain long term
- Go allows me to build portable executables that will make it easier
  for others to run farside on their own machines

The Go version of Farsside also has a built in task to fetch the latest
services{-full}.json file from the repo and ingest it, which makes
running a farside server a lot simpler.

It also automatically fetches the latest instance state from
https://farside.link unless configured as a primary farside node, which
will allow others to use farside without increasing traffic to all
instances that are queried by farside (just to the farside node itself).