docs(wporg): optimize the directory listing for search and conversion

- Keyworded display name: 'WebDecoy Bot Detection - Block AI Crawlers,
  Spam Bots & Card Testing' (name weighs heaviest in wp.org search)
- Tags 5 -> 12: adds honeypot, ai bots, captcha, bot blocker, brute
  force, fraud prevention, anti-spam
- Short description rewritten around the searched-for jobs (AI crawlers,
  CAPTCHA alternative, card testing)
- New 'Deception: the zero-false-positive layer' section and a Deception
  & Traps block in Free Features: the differentiator was nearly absent
  from the listing
- Two new FAQs for long-tail search: CAPTCHA replacement, firewall/
  scanner difference
- Screenshots section trimmed to the 7 images that actually exist
- Em-dash sweep of the whole readme per the copy directive

Author: cport1