chore: remove test artifacts, ignore scan debris (#35)

Drop committed exploitation/scan debris from neurosploit-rs/:
proof screenshots (cj_proof2.png, clickjack_proof.png), hackersec
scan dumps (hs_hdr.txt, hs_index.html, hs_robots.txt, hs_sitemap.xml)
and rl_codes.txt. Keep creds.example.yaml (legit sample config).

Add neurosploit-rs/.gitignore so target/, run state, and scan debris
(*.png, hs_*, rl_codes.txt) never get committed again.


Claude-Session: https://claude.ai/code/session_018BGLy4j5qsqqid6CoovowC

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

neurosploit-rs/.gitignore

@@ -0,0 +1,10 @@
+/target
+# run artifacts / project state
+.neurosploit/
+.playwright-mcp/
+# scan & exploitation debris (never commit)
+*.png
+hs_*.txt
+hs_*.html
+hs_*.xml
+rl_codes.txt