Add code-inspector

[miguelbravo7]

Adds code-inspector — an open-source (MIT) Go CLI and library that reports code-quality metrics across many languages.

It is closest in spirit to lizard/gocyclo already in the list, but combines several metrics in one tool:

• Cyclomatic and cognitive complexity (per function), Halstead measures, and a Maintainability Index
• Token-normalized duplicate/clone detection
• Import dependency graph (fan-in/fan-out + cycle detection)
• Complexity × git-churn "hotspot" ranking to prioritize refactoring
• Multi-language via tree-sitter (Go, Python, JS/TS, Rust, Java, C/C++, C#, Ruby, PHP, Scala, …), plus a registration API for any other grammar

Source: https://github.com/miguelbravo7/code-inspector

Added data/tools/code-inspector.yml following the existing schema (mirrors lizard.yml: name, categories, tags, license, types, source, homepage, description). Disclosure: I'm the author — happy to adjust tags/category/wording to fit the list's conventions.