feat: add wave 2 plugins and --cprofile CLI flag
Add 7 new pure-stdlib plugins: whois (raw TCP port 43), portcheck
(async TCP connect scan with internal-net guard), httpcheck (HTTP
status/redirects/timing), tlscheck (TLS version/cipher/cert inspect),
blacklist (parallel DNSBL check against 10 RBLs), rand (password/hex/
uuid/bytes/int/coin/dice), and timer (async countdown notifications).
Add --cprofile flag to CLI for profiling bot runtime. Update all docs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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