fix(web): embed challenge ID in pass-challenge invocations (#944)

* refactor: make challenge pages return the challenge component

This means that challenge pages will return only the little bit that
actually matters, not the entire component.

Signed-off-by: Xe Iaso <me@xeiaso.net>

* fix(web): move Anubis version info to be implicitly in the footer

Signed-off-by: Xe Iaso <me@xeiaso.net>

* fix(web): embed challenge ID into generated pages

Signed-off-by: Xe Iaso <me@xeiaso.net>

* fix(lib): make tests pass

Signed-off-by: Xe Iaso <me@xeiaso.net>

* test(lib/policy/config): amend tests

Signed-off-by: Xe Iaso <me@xeiaso.net>

* test(lib): fix tests again

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>
Signed-off-by: Xe Iaso <xe.iaso@techaro.lol>

.github/actions/spelling/expect.txt

@@ -52,7 +52,6 @@ checkresult
 chibi
 cidranger
 ckie
-ckies
 cloudflare
 Codespaces
 confd
@@ -297,6 +296,7 @@ thoth
 thothmock
 Tik
 Timpibot
+TLog
 traefik
 uberspace
 Unbreak
@@ -313,7 +313,6 @@ vendored
 vhosts
 VKE
 Vultr
-waitloop
 weblate
 webmaster
 webpage