v3.5.0: Claude-Code-style interactive harness (REPL) + instruction-steered testing

- New persistent interactive session (app/src/repl.rs), launched when run with no args:
  banner, model selection, API-key config (/key) or subscription (/sub), then a live
  session to set /target, /repo, /auth, and free-text /focus instructions (or just type
  them) that STEER which agents run and how.
- Slash-commands: /model /providers /key /sub /target /repo /auth /focus /mcp /votes
  /agents /show /run /quit  (+ bare text = focus).
- RunConfig gains `instructions` and `auth`:
  * instructions bias both LLM agent-selection and the heuristic (focus keywords →
    injection/access-control/etc. agents get a strong boost)
  * operator directives (focus + auth) injected into recon and exploit prompts so agents
    test as an authenticated user and prioritise the requested vuln classes
- bump 3.4.1 → 3.5.0 (CLI, harness, reports, credits)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

neurosploit-rs/Cargo.toml

@@ -3,7 +3,7 @@ members = ["crates/harness", "app"]
 resolver = "2"
 
 [workspace.package]
-version = "3.4.1"
+version = "3.5.0"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/JoasASantos/NeuroSploit"