Fix .be TLD parsing; add google.be test fixture

[Copilot]

The .be TLD definition was broken: it extended "pl" (wrong base), had no explicit _server, and the registrar regex matched Company Name: which doesn't exist in .be WHOIS responses. The .pl definition also used private test domains.

Changes

.be TLD (ZZ["be"])

• extend: "pl" → extend: "com" — pl was an inappropriate base
• Added _server: "whois.dns.be" — not inherited, must be explicit
• Fixed registrar regex: Company Name:\n?(.+) → Registrar:\s*\n\s+Name:\s*(.+) to match actual .be format
• Added expiration_date: None, updated_date: None — these fields don't appear in .be WHOIS output
• Set _test: "google.be"

.pl TLD (ZZ["pl"])

• Removed private test domains jagusz.pl / omnivent.pl
• Added testdata/wp.pl/input as replacement public test fixture
• extend: "uk" → extend: "com", added _server: "whois.dns.pl" and domain_name regex
• Kept _test: "google.pl"

New test fixture

testdata/google.be/input — real .be WHOIS response covering domain name, status, creation date, registrar (Name: key), and bare-hostname nameservers.

Domain:     google.be
Status:     NOT AVAILABLE
Registered: Tue Dec 12 2000
Registrar:
    Name:   Markmonitor Inc.
Nameservers:
    ns3.google.com
    ns1.google.com
    ns2.google.com
    ns4.google.com

---

💬 Send tasks to Copilot coding agent from Slack and Teams to turn conversations into code. Copilot posts an update in your thread when it's finished.