v4.2.4: full Kali sandbox orchestration for recon

Spin Kali up for the engagement, run tool-recon in it, let the LLM refine on top,
tear it down after.

- kali_provision_recon_tools(): installs the recon toolbox (subfinder/httpx/
  katana/gau/waybackurls/nuclei/naabu/dnsx/assetfinder/gf/qsreplace/anew via
  go install + apt) in the Kali sandbox on demand, idempotent, once per run.
- kali_tool_recon(): deterministic tool-recon phase — gau/waybackurls/katana URL
  harvest + targeted nuclei (exposures/misconfig/takeovers, high-signal only) +
  gf-flagged candidate URLs by class — over the live hosts, then folded into the
  recon context so the LLM works on top of the tool output and confirms each.
  Runs in the sandbox (--sandbox) or on host tools via recon_tool().
- Engine autostart: if the container engine is installed but not running, start
  it automatically (colima start / open -a Docker / systemctl start docker /
  podman machine start) and poll until up — a --sandbox run no longer fails just
  because the daemon wasn't started. Clear guidance if it can't be started.
- Teardown: the Kali container is removed at the end of the run (override with
  NEUROSPLOIT_KEEP_SANDBOX=1).

Version 4.2.4 across CLI/clap/web/README/TUTORIAL. 423 tests.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

TUTORIAL.md

@@ -1,4 +1,4 @@
-# NeuroSploit — Tutorial & User Guide (v4.2.3)
+# NeuroSploit — Tutorial & User Guide (v4.2.4)
 
 A complete, hands-on guide to installing, configuring and running NeuroSploit —
 the autonomous, multi-model penetration-testing harness.
@@ -102,7 +102,7 @@ Agents **degrade gracefully**: if `rustscan` is absent they use `nmap`; if neith
 ### Verify
 
 ```bash
-neurosploit --version          # neurosploit 4.2.3
+neurosploit --version          # neurosploit 4.2.4
 neurosploit agents             # {"vulns":255,...,"ai":30,...,"total":480}
 neurosploit models             # all providers & models
 ```