website: a tester recruitment page, and test terms 1.1 (the domain)

New page pair /teszteles + /en/testing: who the closed test is for, what a
tester needs (machine + internet quoted verbatim from the FAQ, plus a domain),
what they get (terms section 3, nothing new), what we ask for, and how many
places there are. Every "Jelentkezem tesztelonek" button now goes there.

Operator rulings 2026-10-10, recorded in CONTEXT.md:
  D1 - the tester's domain is in the TESTER'S OWN name; Felhom pays its fee for
       two years and the tester keeps it when the test ends or they leave; DNS
       is managed with a token scoped to that one zone only.
  D2 - the closed test runs with at most 5 households.

Terms 1.1 adds section 4 (the domain) with the D1 text; old sections 4-11 are
renumbered 5-12 and nothing else changed. Section 11 promises the testers an
e-mail before a change, so one is drafted for the operator to send.

Registered in site_gates.py TWINS/URL and listed in sitemap.xml.

scripts/site_gates.py

@@ -66,10 +66,12 @@ TWINS = {
     "gyik.html": os.path.join("en", "faq.html"),
     "kapcsolat.html": os.path.join("en", "contact.html"),
     "letoltes.html": os.path.join("en", "download.html"),     # R-559 (2026-09-18) — the first twin
+    "teszteles.html": os.path.join("en", "testing.html"),      # 2026-10-10 — the tester recruitment page
 }
 URL = {"index.html": "/", "alkalmazasok.html": "/alkalmazasok", "technologiak.html": "/technologiak",
        "biztonsagimentes.html": "/biztonsagimentes", "gyik.html": "/gyik", "kapcsolat.html": "/kapcsolat",
-       "letoltes.html": "/letoltes", os.path.join("en", "index.html"): "/en/", os.path.join("en", "apps.html"): "/en/apps",
+       "letoltes.html": "/letoltes", "teszteles.html": "/teszteles",
+       os.path.join("en", "testing.html"): "/en/testing", os.path.join("en", "index.html"): "/en/", os.path.join("en", "apps.html"): "/en/apps",
        os.path.join("en", "technology.html"): "/en/technology", os.path.join("en", "backups.html"): "/en/backups",
        os.path.join("en", "faq.html"): "/en/faq", os.path.join("en", "contact.html"): "/en/contact",
        os.path.join("en", "download.html"): "/en/download"}