Add NAAb — polyglot language with LLM governance engine

[b-macker]

Adds NAAb to the tools directory.

NAAb is a polyglot programming language with a built-in governance engine that performs static analysis on embedded code blocks across 12 languages (Python, JavaScript, Rust, C++, Go, Nim, Zig, Julia, Ruby, PHP, C#, Shell).

Governance checks (50+):

• Hallucinated API detection (.push() in Python, print() in JS, etc.)
• Oversimplification detection (stub functions, pass-only bodies, identity functions)
• Incomplete logic (bare except, vague errors, degenerate loops)
• Security analysis (SQL injection, path traversal, shell injection, secret detection)
• Code quality (TODO/FIXME, dead code, debug artifacts, PII detection)

Output formats: SARIF, JUnit XML, JSON
Enforcement: Hard (block), Soft (override with flag), Advisory (warn)
License: MIT
Language: C++17, 15k+ lines, 195 tests passing