v3.5.6 — bug-bounty corpus grounding + 2FA bypass agent; Trendshift badge

- Fetched & analysed real public writeup corpora (Awesome-Bugbounty-Writeups,
  bug-bounty-reference); the technique distribution (XSS/RCE/CSRF/SSRF/2FA/…)
  validates the methodology agent's priorities. Added explicit 2FA/MFA bypass and
  SAML/SSO sections to bugbounty_methodology.
- New agent twofa_bypass_techniques (library 399): full 2FA-bypass playbook
  (rate-limit brute, reuse, response manipulation, step skip, null/default,
  backup/remember-me, race, disable-2FA IDOR, SSO side door).
- README: Trendshift badge.
- Version bumped 3.5.5 -> 3.5.6 across crates/app/installers/docs; RELEASE section.

setup.sh

@@ -28,7 +28,7 @@ cat <<'BANNER'
 
    ███╗   ██╗███████╗██╗   ██╗██████╗  ██████╗
    ████╗  ██║██╔════╝██║   ██║██╔══██╗██╔═══██╗   NeuroSploit installer
-   ██╔██╗ ██║█████╗  ██║   ██║██████╔╝██║   ██║   v3.5.5 — Rust harness
+   ██╔██╗ ██║█████╗  ██║   ██║██████╔╝██║   ██║   v3.5.6 — Rust harness
    ██║╚██╗██║██╔══╝  ██║   ██║██╔══██╗██║   ██║   by Joas A Santos
    ██║ ╚████║███████╗╚██████╔╝██║  ██║╚██████╔╝   & Red Team Leaders
    ╚═╝  ╚═══╝╚══════╝ ╚═════╝ ╚═╝  ╚═╝ ╚═════╝
@@ -63,7 +63,7 @@ if [ -z "$REF" ]; then
   REF="$(dl "https://api.github.com/repos/${REPO_SLUG}/releases/latest" /dev/stdout 2>/dev/null \
          | grep -m1 '"tag_name"' | sed -E 's/.*"tag_name" *: *"([^"]+)".*/\1/' || true)"
 fi
-[ -z "$REF" ] && REF="v3.5.5"
+[ -z "$REF" ] && REF="v3.5.6"
 say "Release: $REF"
 
 installed=0